I published a two page reprint of Paul Ehrlich's best ideas in my newspaper NOMAD in California nearly two decades ago. My ideas back then were more advanced than those of ordinary people but only a shadow of what they would become as I got older. I probably did not fully mature intellectually until the age of 36 and have only come into my very best work in the past three years as I approach 50. I've had a lot of help from the internet.
I realized something at a very young age that most people live and die without ever understanding. It's just as relevant as the day I said it in NOMAD almost 20 years ago.
Population pressure is the root of all evil. It activates all the anti-life instincts and self-destructive urges that are latent in mammals to avoid overcrowding. These instincts are likely millions of years old and hardly easy to circumvent.
For example, if we say that the populations of the West are awfully amenable to the ideologies of self-loathing and self-hatred propagated by opportunists ... what is the root of this tree of evil that lends their ears to this kind of lunacy? What is the tipping factor that makes mammalian minds receptive to doctrines of oblivion? Termites only attack sick and dead wood. Our termites are successfully eating us from the inside because our wood is unhealthy to begin with. What is it giving us a damaged immune response to begin with?
I would say population pressure. Five words that summarize a lifetime of thinking about the problem.
Paul Ehrlich is living in a cotton candy rose-colored dream world if he sincerely thinks there is a 10% chance of avoiding a civilization collapse. I'd peg it at odds a million to one that anything could turn this situation around.