Sir David Attenborough (b. 1926) is an English broadcaster best known as the writer and presenter of the BBC's Life nature documentaries. Attenborough was knighted in 1985 and is considered a national treasure in Great Britain. His brother was the late filmmaker Richard Attenborough.

"Human beings are good at many things, but thinking about our species as a whole is not one of our strong points."

Source: How Many People Can Live on Planet Earth? (BBC Horizon, 2009) (via WikiQuote)