In an interview with Emily Maitlis in the new issue of Radio Times, Attenborough also said he was worried the "catastrophic" disregard for expert opinion is damaging to democracy.
"There's confusion, isn't there, between populism and parliamentary democracy," he told Radio Times. " I mean, that's why we're in the mess we are with Brexit, is it not?"
In the interview, Attenborough cites politician Ken Clarke's new book, in which the Tory MP claims that if people were asked whether they'd like a National Gallery or a funfair they'd vote for the funfair.
"Do we really want to live by this kind of referendum?" Attenborough asked. "What we mean by parliamentary democracy is surely that we find someone we respect who we think is probably wiser than we are, who is prepared to take the responsibility of pondering difficult things and then trust him – or her – to vote on our behalf."