Gandhi taught the concept of nonviolent protest to the world. Without a doubt, they are two of our greatest modern heroes.

Definitely Gandhi is one of the greatest hero and even Martin Luther King was inspired very much by him. I visited Gandhi's birth place (Had done a post here as well) and interestingly I came to know, he belonged to a very rich family of his time but he left everything behind and worked for the greater cause. That motivates me a lot. Sacrifice is barely seen now a days.