There are lots and lots existential crises that could befall mankind. To avoid having our eggs in one basket it is best to colonize other planets. (of course th

There are lots and lots existential crises that could befall mankind. To avoid having our eggs in one basket it is best to colonize other planets. (of course there are other reasons for colonization). Short list of extinction events: global nuclear war, major asteroid hit, deadly disease that can't be contained, skynet like scenarios if AI turns out to be possible, global warming making us go Venus like etc etc. The chance of each of these events is very small (except probably the last one which many would say is almost certain), but why would you not hedge your bets? When colonization would be so cool - the final frontier after all.