We, as a civilization, continually make the same mistakes over and over again. A good study of history would make one realize that most humans were in a near constant state of war for the the last 30,000 years. Most likely, it all started when bacteria "A" ate bacteria "B"'s food particle, and we've been fighting ever since.
Thus, evolution began.
With the declaration of war by bacteria B, the three billion year war began. 10^114 innocents were raped. 10^99543 were killed, often eaten alive. At first it was between those that wanted to eat their food particles in peace and those who wanted to hoard food particles for themselves. At first, the two sides were evenly matched, but the hoarders ate more and got bigger, until they started to see the pacifists as food. Thus the war became more intense. The pacifists now needed a means to protect themselves from the predators. They opted for a variety of defenses, poisonous gases, calcium spikes, gorging on food particles themselves, but the wiley predators were always a step ahead of them. For three billion years the two sides battled, although the battlefield changed dramatically through that time. At first, the sides were clearly drawn, but as the conflict raged on, it was eventually forgotten what the fuss as all about. This took approximately two weeks. However, some three billion years later, a sign of change has arisen. For the first time in known history, a peaceful resolve is brewing amoung many of the thousand sides. People now willingly march in the streets and tell the alpha males to merrily fuck off when the they tell \ them to send their children to die. It's a start, more work is needed, but for the first time, the conflict between those who have enough and those who want more is beginning to be resolved. Let us push on in this effort!