The world is led by people who have the conviction that they are right.

Most people are reasonable and therefore do NOT have this conviction, because they stop to question themselves and stay grounded in reality.

But then there's the feeble-minded, the narcissists, and the sociopaths.

The first ones are quickly excluded from wielding any real power and mostly stick to yelling at other donkeys on the internet (where they do cause a lot of harm and can be easily shepherd - see US Capitol insurrection).

The others are what's called the ruling class.

And that, kids, is why CEOs and politicians like Trump and his like rule the world.