TED Talk: What is purpose to Rick Warren?

After writing The Purpose-Driven Life, Mark Warren questioned his own purpose in life with the reception of money and prestige. He also questioned the purpose of mankind as a whole.

What he came up with was the following: All of the gifts that individuals are given, no matter how big or small, should be used to make the world a better place.

Warren wants to go on the attack against spiritual emptiness, egocentric leadership, extreme poverty, pandemic disease, and illiteracy and poor education. Shouldn't we all want to correct these problems of the world?