"Desperation has led to a "dangerous" idea: perhaps we live in an anthropically selected universe. According to this view, we live in a multiverse ...it is not scientifically verifiable. ...it leads inevitably to a depressing end to science. ...it is far too early to be so desperate. This is a dangerous idea that I am simply unwilling to contemplate."
January 1, 1970
https://en.wikiquote.org/wiki/Multiverse