That doesn’t contradict what I said. Human beings must necessarily cooperate and aid each other in order to survive. It’s how our species evolved. However, that doesn’t mean humans only ever aid each other, or even that they care about others except as a means to survive. Humans will cooperate when it’s beneficial and also stab their fellow humans in the back, step on them and exploit them when it’s beneficial. That’s why all we have are systems of elites and peasants, filled with squalor and death. But the species continues because of those systems.