When nature put the tribal impulse within the base human ego, it meant well. It said to itself wouldn’t it be great if like peoples could work together for the common good of all. Unfortunately nature forgot that every positive must have a negative offset. In this case the offset of the tribal impulse for cooperation among like kinds is fear and hatred of the “other.” Balance!
And it’s that darn offset thing that scews up the entire universe, let alone human existance. For every President Obama there must be an offsetting President Trump. Bummer!