The 20th century, which we have just left behind us, was a century of war and conflict, leading to disasters, pain, massacres, poverty, and enormous destruction. Millions of people were killed, massacred, abandoned to hunger and death, and left without home or shelter, protection, or support. And all for nothing: in the name of serving deviant ideologies. Millions were left exposed to inhuman treatment that not even animals should be allowed to suffer. On nearly every occasion there were despots' and dictators' signatures beneath all the suffering and disasters: Stalin, Lenin, T rotsky, Mao, Pol Pot, Hitler, Mussolini, Franco… While some of these men shared the same ideology, others were enemies to the death. For the simple reason that their ideologies were opposed to each other, they dragged societies into conflict and turned brother against brother, having them start wars, throw bombs, burn and destroy cars, homes, and shops, and hold riotous demonstrations. Putting weapons in their hands, they had them pitilessly beat the young, the old, men, women, and children to death or stand them against a wall and shoot them… They were ruthless enough to hold a gun to a person's head and, looking into his eyes, kill him, and crush his head with their feet, just because he supported another idea. They ejected people from their homes, whether women, children, or the elderly… That is a short resume of the nightmares of the 20th century that we have just emerged from: people who supported conflicting ideas and who drowned mankind in pain and blood in the name of supporting these ideologies. Fascism and Communism come at the head of the ideologies that caused mankind to suffer those dark days. These are seen as enemies, as ideas that tried to destroy each other. In actual fact, there is a most interesting truth here: for these ideologies were nourished by a single ideological source, drew strength and support from that source, and, thanks to that source, were able to draw societies to their side. At first sight, this source has never drawn any attention, has always remained behind the scenes up until now, and has always shown people its innocent-looking face. That source is the materialist philosophy, and DARWINISM, the state of that philosophy as adapted to nature.