That's not necessarily the case. When populations have adequate resources, they do not explode. Their birth rate falls. This has been seen repeatedly all ove

That's not necessarily the case. When populations have adequate resources, they do not explode. Their birth rate falls. This has been seen repeatedly all over the world across myriad human cultures. Failure to account for it screwed Japan who banked on an infinitely growing population, is currently screwing South Korea for making the same mistake, and will screw the US (and probably most others) eventually. The real danger is that with agriculture, unlike with nomadic tribes, if someone decides to dominate others in a region, the tribe can't just leave that person behind. A nomadic tribe goes over the next hill and leaves the jerk to be dominant over the weeds and sticks. An agricultural society just gets dominated.