He included scenarios that were interpreted as predictions, leading to criticism when they didn't come true. He acknowledges that while the scenarios were meant to stimulate thought, they were misconstrued as precise forecasts.
He sees the loss of biodiversity as a critical issue, emphasizing that humanity is dependent on the natural systems that biodiversity supports. He argues that the destruction of these systems is threatening our survival.
He believes that wealthier, healthier, and more educated populations tend to have fewer children and care more about the environment. However, he also notes that wealth redistribution is necessary to achieve this globally.
He is cautious about electric vehicles, noting that they still require significant resources and infrastructure. Regarding nuclear power, he believes it should be part of the energy mix but acknowledges psychological and political challenges, including the risk of accidents or misuse.
He considers it technically possible but questions the ethical implications and practicality. He warns against moral hazard, where the belief that extinct species can be cloned might reduce efforts to prevent extinctions in the first place.
He argues that the current global population of over 8 billion is unsustainable, especially as people aspire to higher standards of living. He cites economist Sir Partha Dasgupta's estimate that humanity could only support around 3 billion people at a Mexican standard of living.
He advocates for redistribution of wealth and resources to ensure a smaller, sustainable population can live well without destroying the planet's life support systems. He emphasizes the need for global cooperation and education to achieve this.
He believes the current polarization is severe but not unprecedented, citing the violence and division during the Civil War era as an example of a similarly intense period in U.S. history.
He envisions a potential future without nation-states, where people live in city-states with open borders and fewer political obstacles. However, he emphasizes that achieving this requires addressing current environmental and political challenges.
He argues that biodiversity loss affects everyone, as humanity depends on natural ecosystems for survival. He stresses the need for global cooperation to address this issue, especially in poorer countries where biodiversity is often threatened by poverty and corruption.
Paul Ehrlich reflects on his extensive career, including what he got wrong in The Population Bomb, the challenges of population growth, and the critical issue of biodiversity loss. He also discusses the importance of education and wealth in promoting environmental stewardship, the role of nuclear power, and the ethical dilemmas of cloning extinct species.
Paul Ehrlich is Professor Emeritus of Population Studies in the Department of Biology and the president of the Center for Conservation Biology at Stanford University. He is the author of The Population Bomb. His new book is Before They Vanish: Saving Nature’s Populations—and Ourselves.