Speaking to Radio Times, he also said that China's one child policy wasn't a terrible idea, and that humanity has essentially stopped evolving.
As the Guardian reports, Sir David Attenborough, the famous broadcaster and naturalist, is becoming increasingly outspoken. Earlier this year he described humans as a "plague on Earth." Now he's saying that humans have stopped evolving physically and genetically on account of birth control and abortion; he's basically saying that we've put a halt to natural selection. At the same time, however, he believes that cultural evolution is proceeding with "extraordinary swiftness."