We know from school that the fittest survives in nature. But is it really so? Anthropologist and Ph.D. Brian Hare made an important discovery: the most profitable survival strategy is friendliness. It was this mechanism that allowed Homo Sapiens to stay alive and thrive, wolves to love people, bonobos to create a paradise and the Soviet scientist to make a world breakthrough in genetics. But there is a downside to this - we are cruel to those we do not consider our friends. Man is able to dehumanize enemies and destroy entire peoples. All this because of the same mechanism that developed empathy and mercy in us. Brian Hare's research explains the wars of the past and modern politics, and most importantly, why it is so important for us to have common interests and help loved ones.