Science-based awareness raising for a

Sustainable population

in balance with planet Earth

We are currently

humans on Earth

Our mission is to scientifically raise awareness about the impact of human population, its size and density on society and on our most precious livelihood, planet Earth.

“It’s our population growth that underlies just about every single one of the problems that we’ve inflicted on the planet. If there were just a few of us, then the nasty things we do wouldn’t really matter…”

Jane Goodall – anthropologist and biologist

“The human population can no longer be allowed to grow in the same old uncontrolled way. If we do not take charge of our population size, then nature will do it for us.”

David Attenborough – Naturalist and Broadcaster

“Population stabilisation should become a priority for sustainable development, including a strong focus on the empowerment of women and girls.”

Kofi Annan – 7th UN Secretary-General

“You know, I have often thought that at the end of the day, we would have saved more wildlife if we had spent all WWF’s money on buying condoms.”

Sir Peter Scott – WWF Co-Founder

“There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.”

Norman Borlaug – Agronomist, Nobel Peace Prize laureate

“The wealthy nations and wealthy consumers have, of course, the greatest impact, but sheer numbers do count. There are ways that we can stabilize human population without unpleasantly imposed restrictions…”

Rex Weyler – Greenpeace Co-Founder

“It is not feasable to expect a finite planet to support infinite growth. I am most inspired by efforts to improve sex education and contraceptive availability so women have more choice.”

Lily Cole – Model, Actress and Entrepeneur

“If we do not voluntarily bring population growth under control in the next one or two decades, then nature will do it for us in the most brutal way, whether we like it or not.”

Henry Way Kendall – Physicist, Nobel Prize laureate

Featured from our blog

  • Letter to NGOs participating in COP30

    During the second week of November the COP30 climate conference will take place in Brazil. We sincerely hope that the population factor within climate change will get mentioned during the conference, but we fear it will be overlooked again. Although scientists have confirmed the impact of population growth on climate change – and the potential…

  • EurASP interview from our colleagues down under

    Our Australian colleagues from Sustainable Population Australia (SPA) have published an interview with eurASP co-founder Fons Jena in their latest newsletter (August 2025). You can read the newsletter here (PDF) but we also copied the interview here below: For this edition of ‘Sister Organisations’ we were fortunate to interview Fons Jena, Chairperson of The European…

  • Immigration: the position of eurASP

    Download pdf An honest constructive dialog around immigration is today as important as it is difficult. It is important because migratory flows – which have always existed in history – today have reached an unprecedented scale, deeply affecting demography, environment and societies. It is difficult because immigration is a sensitive and highly polarized topic: on…

Our blog

Sustainable population

Human population growth and high consumption levels are at the root of our most pressing environmental problems, including the wildlife extinction crisis, habitat loss, pollution and climate change. 

It’s not only about our individual consumption but also about the numbers of consumers. Numbers really do matter, so what is a sustainable population?

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The benefits

We seem to be able to adapt to a more technological world that is organized in such a way that it allows space for more people. 

But what is the cost of it for our environment and nature, our livelihood? How does it affect the quality of life and the relationship we have with nature?

We do not often think about it, but a sustainable population could have many benefits.

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