[quote=Kaga]
I once found a very interesting Youtube video on the subject, but apparently I never bookmarked it.Hang on, it might take me a minute to find it again...
[/quote]

May have been Vsauce's video "Why don't we all have cancer?" This question reminds me of that.

Anyway, on-topic: I'll answer this question in an equally pseudoscientific and philosophical way tomorrow.