We are all used to the diagrams of human evolution, showing how man progresses until the first halve of the twentieth century.
This diagram is a little more up to date. The beginning is fairly common, showing man in his ape like form.
He then moves into a two legged walking position and begins to carry tools.
The next stage of the evolution man is walking almost upright and carrying a spear.
In the middle, man in his prime, walking fully erect, carrying a machine gun.
Now our current state, overweight, sipping a milkshake, and eating a hamburger.
Of course the final stage is the pig.