english: It's very simple: Many thousands of years ago, we discovered that if we carried on doing the same things, we wouldn't die, because the things that we've done before by definition didn't kill us, and therefore as long as we carry on doing them, we'll be okay, and it's very sensible not to do anything new, because it might kill you.
non_english: Jednostavno je: hiljadama godina unazad otkrili smo da ako nastavimo da radimo iste stvari, nećemo umreti, jer nas ono što smo radili pre, po definiciji nije ubilo i zato dokle god nastavimo po starom, bićemo dobro. Razumno je ne raditi ništa novo jer bi nas to moglo ubiti.