I like to do little experiments with my tribes (most of which I end up abandoning after a few days when I get bored of them).
I've tried starting with all nursing moms (they survived), all kids (they thrived... had like 5,000 food by the time they grew up), all learners, all runners, only one head (I was going for a tribe of a hundred clones, but got bored).
Another thing I've tried is not touching any of the heathens to see how far in the game you could get without converting anyone or breaking any of the totems. That was a fun one I suggest people try.
_________________________
Runners... never enough runners....