Linking population growth and biodiversity loss: a new bibliography

Excessive and growing human numbers are a leading cause of decreasing biodiversity in many parts of the world. In researching a paper on this topic last year, we became aware of the large amount of good scientific work recently published on it. In an effort to spur more such work, we are publishing an annotated … Continue reading Linking population growth and biodiversity loss: a new bibliography

Eight Billion – Our Greatest Mistake

According to the United Nations Population Fund, reaching a global human population of 8 billion is an achievement to be celebrated. In “a world of infinite possibilities,” they state, “imagine the boundless paths 8 billion can take.” Rather than taking refuge in irresponsible fantasies, it’s time our bloated societies reckoned honesty with demographic reality. By … Continue reading Eight Billion – Our Greatest Mistake

The moral imperative of depopulation

Anthropocentrism is preventing humanity from dealing with the world’s cascading environmental crises. Stephen Williams reviews the work of Catholic historian Paul Collins who argues depopulation is an urgent moral imperative. By Stephen Williams A new discussion paper on population ethics written by Catholic historian Paul Collins is as radical as it is worthy. The paper … Continue reading The moral imperative of depopulation

Population growth has contributed 80% of ecological overshoot

William Rees is the originator of ecological footprint analysis, the influential approach to measuring sustainability. In a new article, he argues that humanity is deep into ecological overshoot and that we need to ratchet back our numbers and the size of our economies before nature does it for us. by Philip Cafaro William Rees has … Continue reading Population growth has contributed 80% of ecological overshoot

More like a dying planet report

Earth continues to hemorrhage biodiversity, according to the latest Living Planet Report. Unfortunately, its authors cannot manage a clear statement of how to stop the bleeding. by The Overpopulation Project “You could think of it as a health check for the planet,” says the World Wildlife Fund, introducing its most recent biennial Living Planet Report, … Continue reading More like a dying planet report

Conserving biodiversity means limiting human numbers

A recent letter in Biological Conservation criticized TOP researchers for writing about how more people means less space for wildlife. We responded that without limiting our numbers, people will not be able to protect the natural world. Who’s right? Please share your thoughts and ideas in the on-line comments below. by The Overpopulation Project This … Continue reading Conserving biodiversity means limiting human numbers

Is it wrong to explore the connections between overpopulation and biodiversity loss?

A recent letter in Biological Conservation criticizes TOP researchers for writing about how more people means less space for wildlife. We are curious what our readers think of the arguments and how you would respond. Please share your suggestions in the on-line comments below. by The Overpopulation Project This summer, TOP researchers published an article … Continue reading Is it wrong to explore the connections between overpopulation and biodiversity loss?

Population and the Great Transition

In June, the Great Transition Initiative ran a month-long forum under the title The Population Debate Revisited. The collection of contributed essays is now accessible on the GTI’s site, and makes for interesting reading. We thought three of the essays held particular merit and will republish them here over the next few weeks. The first … Continue reading Population and the Great Transition

New publication shows how overpopulation drives biodiversity loss

The concept of human overpopulation, once common, is now rarely used in the scientific literature. Yet overpopulation is a major driver of biodiversity loss and a key obstacle to fairly sharing habitat and resources with other species. A new publication from TOP explores the connections between human numbers and preserving wild nature. by The Overpopulation … Continue reading New publication shows how overpopulation drives biodiversity loss

On Threats and How to Prevent Them

Threats that humanity faces today are planetary in scale. That and their menacing character require long-term thinking and preventive politics to deal with or, better yet, prevent them. This may require planetary governance that unites humanity for mutual protection. by Jan Greguš, Masaryk University, Czech Republic  Few would have believed five or ten years ago … Continue reading On Threats and How to Prevent Them

A new approach for defining optimum population size

The concept of optimum population size is nothing new, but in recent decades the methodology used to calculate it has seen little development. In a recently published book, We Zijn Met Te Veel (Dutch for We Are Too Many), a new approach is proposed for calculating optimum population size. by Fons Jena In the available literature … Continue reading A new approach for defining optimum population size

A Foundation on the Right Track

One of the biggest obstacles to addressing overpopulation is the ignorance and timidity of most environmental funders regarding population issues. So we were happy to recently come across the following text on the website of the Colcom Foundation, a major environmental foundation out of Pittsburgh, Pennsylvania, USA. Particularly welcome are the direct links they draw … Continue reading A Foundation on the Right Track

Defining Overpopulation

A recent book introduces a new approach to the science of overpopulation. We Zijn Met Te Veel (Dutch for We Are Too Many) explores a new theoretical foundation for the concept of overpopulation and explains why a smaller human population is a necessary – but not sufficient – condition for a more hospitable world. by … Continue reading Defining Overpopulation

The Making of 8 Billion Angels

8 Billion Angels is a rare full-length environmental film focused on population issues. Producer Terry Spahr joins Phil Cafaro for a discussion of the making of this fascinating film in an episode from season two of The Population Factor.  by the Overpopulation Project 8 Billion Angels is both visually stunning and thought-provoking. If you haven’t … Continue reading The Making of 8 Billion Angels

The decision to forego childbearing

Should you bring children into a crowded and ecologically declining world? More and more young people are asking themselves this question. One woman explores her personal choice in a global perspective.  by Gaia Baracetti It's definitely a thing now. Here in the West at least there seems to be an almost incessant flow of articles … Continue reading The decision to forego childbearing

The Population Factor returns for a second season

The Population Factor, the show hosted by The Overpopulation Project's own Phil Cafaro, returns with a second season, starting off with a discussion about the Nature Needs Half proposal. by The Overpopulation Project Wildlife populations are dwindling rapidly across much of the world and the number one cause is habitat loss, driven by excessive human … Continue reading The Population Factor returns for a second season

Students view human population growth as a threat to biodiversity

In their curriculum, university students in biology and environmental sciences rarely learn how human population growth affects the environment, or discuss its role relative to other factors. Human activities are often dealt with in courses, but not population increase. One exception, described below, comes from a Swedish ecology class that learned about and discussed how … Continue reading Students view human population growth as a threat to biodiversity

The moral case for population reduction

A frequent assumption in population policy debates is that stabilizing populations will be sufficient to achieve ecological sustainability. But as Karin Kuhlemann observes, “that a population’s size is stable in no way entails sustainability. It may be sustainable, or it may be far too large.” A recent book from philosopher Trevor Hedberg convincingly argues the … Continue reading The moral case for population reduction

Honouring World Population Day with Women’s Personal Stories

A new initiative aims to draw attention to stories about population and consumption from women around the world to mark World Population Day. The focus lies on personal experiences and encourages a greater discussion about the links between population, consumption, and protecting nature. By Pernilla Hansson World Population Day is held every year on the … Continue reading Honouring World Population Day with Women’s Personal Stories

An Environmental Impact Statement on US Immigration Policy

What impact does US immigration policy have on greenhouse gas emissions, habitat preservation, or water and air pollution? Episode six of The Population Factor on Earthx TV addresses these questions, while episode seven, the final episode of season one, discusses how declining human populations open up new opportunities for ecological restoration. by The Overpopulation Project … Continue reading An Environmental Impact Statement on US Immigration Policy

Population Dynamics, the Concept of a “System,” and the Law of Unintended Consequences

by Larry D. Barnett The presence of too many people on planet Earth is a problem that generally receives just lip service. The lack of interest in the problem should not, however, be surprising. Hominids have been on Earth for millions of years,[1] and modern Homo sapiens has been around for millennia - by one … Continue reading Population Dynamics, the Concept of a “System,” and the Law of Unintended Consequences

Earth Wars: Nature Strikes Back

The current pandemic has had many severe consequences, but it has also acted as a reminder of the need for international cooperation when facing global challenges. Continued environmental destruction will likely increase the risk for future pandemics. Population growth is one of the main driving factors of the continued encroachment into nature and needs to … Continue reading Earth Wars: Nature Strikes Back

IUCN recognizes the importance of attending to population to preserve biodiversity

After decades of silence, the International Union for the Conservation of Nature has passed a motion reaffirming the importance of addressing population matters to achieving conservation success. This continues a welcome recent trend among conservation scientists to speak up about the potential benefits of reining in population growth. by Pernilla Hansson The International Union for … Continue reading IUCN recognizes the importance of attending to population to preserve biodiversity

What is the optimal human population? An eminent economist weighs in

Efforts to specify the optimal human population on Earth are as complex as they are controversial. A recent book from Cambridge University economist Sir Partha Dasgupta develops a theoretically rigorous approach to this perennial question, finding that an optimal human population might range from 500 million to 5 billion. by Phil Cafaro It is gratifying … Continue reading What is the optimal human population? An eminent economist weighs in

‘A Life on Our Planet’: Attenborough’s recipe and human reluctance — Chronicle of a failure foretold

"Never let your sense of morals prevent you from doing what is right" I. Asimov In the outstanding film “A life on our planet”, Sir David Attenborough tells us which actions we need to implement to avoid a future catastrophe. His plan is feasible and affordable: we already have all the knowledge and technology required … Continue reading ‘A Life on Our Planet’: Attenborough’s recipe and human reluctance — Chronicle of a failure foretold

Australia’s Population Ponzi Scheme

The current economic system in Australia is a Ponzi scheme based on maintaining positive GDP through migration. Populations of native species are plummeting and people are faced with increased job insecurity and housing costs, all of which are side effects of the Australian government's ongoing drive for an ever increasing population. by Kelvin Thomson In … Continue reading Australia’s Population Ponzi Scheme

A Decreasing Population Furthers Rewilding Efforts in Romania’s and Ukraine’s Danube Delta

Since the fall of the Eastern bloc, both Ukraine and Romania have seen their populations shrink. Driven by rural to urban migration, low fertility rates, and substantial emigration, the depopulation in the Danube Delta region has opened up large areas to rewilding efforts. With a history of irrigation and altered river dynamics, restoration and reintroduction … Continue reading A Decreasing Population Furthers Rewilding Efforts in Romania’s and Ukraine’s Danube Delta

New EU Biodiversity Strategy Fails to Address a Key Component of the Biodiversity Crisis – Human Numbers

The latest biodiversity strategy from the EU Commission makes some good suggestions for increasing protection for Europe’s dwindling biodiversity. While new, ambitious targets for protected areas and ecological restoration are welcome, the document fails to point out the central role population size will play in whether they are achieved. Through allowing the EU’s human population … Continue reading New EU Biodiversity Strategy Fails to Address a Key Component of the Biodiversity Crisis – Human Numbers

Fewer People = More Wild Nature in Croatia’s Velebit Mountains

In the Croatian alps, declining human populations have gone hand in hand with expansions of protected lands and resurgent wildlife populations. Large predators are finding their way back to the region now that the anthropogenic pressures have lightened, and rewilding efforts have ensured the comeback of both mountain-dwelling herbivores and large grazers on the adjacent … Continue reading Fewer People = More Wild Nature in Croatia’s Velebit Mountains

Can Human Use Be Combined with Biodiversity Protection in the Tropics?

With the ongoing tropical biodiversity crisis, protected areas play an important role for many species. But strict protection can harm local human communities that are reliant on the lands around them for survival. In addition, resources are often lacking to prevent illegal exploitation or hunting in strictly protected areas. Community-managed reserves have been suggested as … Continue reading Can Human Use Be Combined with Biodiversity Protection in the Tropics?

Restoring Abandoned Land in the Oder Delta Gives New Opportunities for Wildlife in Germany and Poland

With decreasing populations in parts of rural Europe and marginal agricultural lands being abandoned, Europe is in a strong position to return land to wilderness. At the northern end of the border between Poland and Germany lies the Oder delta, where rewilding efforts on land and in water have contributed to a quick recovery of … Continue reading Restoring Abandoned Land in the Oder Delta Gives New Opportunities for Wildlife in Germany and Poland

Fewer people leads the way to rewilding in Portugal

Depopulation has led to abandonment of less fertile agricultural lands throughout Europe. Portugal, with its declining population, is a prime example. In the Côa Valley, the abandonment of farmland has been turned into an opportunity for rewilding efforts to create new wilderness. Already the valley has seen the return of many endangered species, such as … Continue reading Fewer people leads the way to rewilding in Portugal

TOP publishes new paper on the potential environmental impacts of EU immigration policy

Last year, TOP researchers published new policy-based population projections for the European Union. In a new companion piece, we explore the impacts of alternative immigration policies on two important EU environmental goals: reduction of greenhouse gas emissions and improved biodiversity conservation. We find that in both cases, less immigration, leading to smaller populations, will make … Continue reading TOP publishes new paper on the potential environmental impacts of EU immigration policy

Five myths about population, aging and environmental sustainability

By Jane O’Sullivan, Francesco Ricciardi, Susann Roth For sustainable development, universal wellbeing should be the goal, rather than endless growth. Minimizing further growth in human populations is only part of the solution, but an essential part. Climate change has been described as one of the greatest challenges of our time. But for many Asian countries, … Continue reading Five myths about population, aging and environmental sustainability

Empty skies, empty words

This past week, a widely reported article in Science found that since 1970, North American wild bird populations have declined by 30%. In response, conservation organizations banded together to advocate that concerned citizens keep their cats indoors, put tape on their windows, and drink “bird friendly coffee.” This—the massive and continuing decline of wild nature … Continue reading Empty skies, empty words

An ecologically sustainable future requires addressing both population and consumption

In a new review article published in the journal Environment, Development and Sustainability, Elias Ganivet reminds us that we need to address both excessive human consumption and population growth, to curb humanity’s environmental impact. Written from a very balanced perspective, Ganivet reviews the impacts of human population growth on global biodiversity and climate change, perceptions … Continue reading An ecologically sustainable future requires addressing both population and consumption

More and more people living on the planet is cause for concern

TOP assisting researcher, Patrícia Dérer, was recently interviewed for the Hungarian newspaper, 444. The article, shortened and translated to English, includes highlights from her interview where she discusses the conditional nature of population projections, the link between population and biodiversity, the declining population of eastern Europe, successful family planning programs, and much more. By Zsolt … Continue reading More and more people living on the planet is cause for concern

Family Planning for forests and people – the success story of Costa Rica

Costa Rica is a country of exceptionally rich and well-protected biodiversity. It is a solid democracy where people live long, relatively healthy and happy lives while leaving a small ecological footprint. Together with its good and improving environmental performance and overall well-being, the country is characterized by a below replacement fertility level, the lowest in … Continue reading Family Planning for forests and people – the success story of Costa Rica

Civilization extinguishing biodiversity, where are the viable alternatives?

A new United Nations report on biodiversity was released this week with much media coverage. Scientists and mainstream journalists seem unwilling to address the fundamental drivers of biodiversity decline, but public response suggests transformative change is gaining traction. By Jenna Dodson This week, many media outlets are covering the pre-release of a new United Nations … Continue reading Civilization extinguishing biodiversity, where are the viable alternatives?

Low fertility in South Korea: a springboard for social change and conservation

In the 1960s and 70s, South Korea experienced one of the fastest fertility declines in the world, halving the number of children born per woman from over 6 to less than 3 in just 18 years. In large part, this was due to early government recognition that fertility reduction is a component of development, a … Continue reading Low fertility in South Korea: a springboard for social change and conservation