It's a very simple concept. Take any issue in this world. Every thing has more than 1 side or viewpoint to it. But who is right? Who is actually the real viewpoint? The answer is, there is none. The winner is whoever is able to assert their willpower the most over all others. That's the viewpoint that wins.

For instance, black people think they are right, white people think they are right. What's the right answer? There is none. Islam thinks they are the way. Christians think they are the way. Western secular/capitalism thinks they are the way. Who is right? It all depends on which side you are coming from. I could be a muslim one day and decide that since I'm immersed in the muslim culture, I see the world through their eyes and now I believe this is the correct way and the rest of the world should follow. Then a day later, I could decide to be an atheist who loves capitalism and secularism and I can be immersed in that way of living and decide this is the true way and all others should adopt and follow this thinking. The point, everyone thinks that their view is the right view and the only way. In that case, there is only one thing left to decide it once and for all. Whoever wins the battle of asserting their will. That's it. Plain and simple. If you can assert your will over most of the world (or all of it), you win! No matter how stupid and silly your beliefs might be, if 90% of the world believe it, you are the winner and your views are right.