Why are militarism, prejudice and disinformation so prevalent in the politics of today?

Why can't the world find a better way of doing politics?

The spectacular collapse of the Soviet Union in 1991 after just 69 years of the victory of Russian communism in 1921 has doomed communism forever.

And, because of the prevalent toxic politics and the inherent selfish nature of nation states, the present form of Western democracy has betrayed all the lofty ideals of justice, equality, freedom, and peace that democracy is supposed to bring for the benefit of the greatest number of people.

So, what is to come next?