The principle of human revolution focuses on precisely that: inner transformation at the most fundamental level.

Buddhism Day by Day

Wisdom for Modern Life by Daisaku Ikeda
Saturday, August 17, 2013:

 

The Buddhist teaching of the oneness of life and its environment tells us that humanity and the natural world are one. That is why if we wish to protect the environment, we must transform and purify the three poisons—greed, anger and foolishness—that exist in people's lives. The principle of human revolution focuses on precisely that: inner transformation at the most fundamental level.