This is simple. In order to ultimately change the world we have to change ourselves. To change ourselves is to change how we think.
Adolf Hitler didn’t start out as someone who had interest in politics, actually he hated the thought of becoming a public servant. Whether in a bad way or good way, he changed the state of this world with his thoughts and leadership style. Hitler may have had the signs of dictatorship, but he wasn’t what he became to be.
Shaka Zulu, Malcolm X, Martin Luther King, Jr. and many others, all became what they became through change.