They all had contact with each other at one point.
Our genetic ancestry can be traced back to one valey in africa.
Plus the other way of thinking about things like that is that we're genetically predisposed to think about life after death, not that we thought of it of totally free will.
(PsychoChomp, Tue 3 Aug 2010, 11:20, 1 reply, 16 years ago)

If we're genetically predisposed to think about it, and even believe in it, then why?
It's not so implausable, think of a queen bee that releases fairomones when they die, 100 or 200 years ago, such things were unexplainable, in 100 years who knows what we'll explain about what we don't know today.
( G/PP 💩💩💩💩💩&#128, Tue 3 Aug 2010, 11:24, Reply)

Depends who you ask,
evolutionary psychologists think it's an intergral part of society and so it was an advantage early in our history. Honestly we don't know yet, if it's even true let alone what the causes are.
(PsychoChomp, Tue 3 Aug 2010, 11:43, Reply)

It's a good motivator to get people to do bad-for-self-but-good-for-the-tribe things, certainly.

(wellgroomedwookiee is a filthy-minded hobgoblin, Tue 3 Aug 2010, 11:52, Reply)