Why Does History Look Like That?

Why is history so dark? Why is there so much bloodshed and killing?
Studying the way the world works can take the psyche to some dark places. Understanding why things are the way they are can present some grisly pictures of reality to the mind. But I say! I’d rather know the ugly truth than live in a comforting LIE!!
We Moderns think of ourselves as moral and righteous. We think that we would unconditionally respect one another’s rights, and dignity. And we think all of this because external conditions have facilitated it. In other words, if external conditions changed from predominantly growth-based to contraction-based, our morality would go out the window. We would regress back to the modes of being our ancestors had to inhabit to survive and pass their genes on into the future. When it’s zero-sum dynamics, and it’s my tribe versus yours, the game becomes grisly, ghastly, and diabolical very quickly.
Our best bet of staving off such a G3n0CyDal impulse is to understand what we humans are, as a uniquely unique species among many other species, who have developed technological capacities that confer to us the power of gods.
We’d do well to develop the necessary wisdom to wield that power appropriately.