@donkeypong, That's inspiration to read perfectly wrote blogging. You introduced main topic with using most popular three persons around the world. We all are humans. We have good time and bad time still our life time. Every assistance needed of our sadness/ bad times. If we're happy don't need help others. (It mean if we have more wealth no need help).

When times are tough for a lot of people, charity and philanthropy become even more important.

Yep..That would be amazing quote in fact. Bill Gates and Andrew Carnegie earn more wealth income before every donations. They were achieved to collected more properties. Then they had more income & found enough resources to spend next three or four generations. Both of them finally decided to donate funds to desolate peoples who stay around the world.
But Mother Theresa did various side for desolate peoples. She helped via using her man power. I've read her life character. she must have helped many thousands of people during her lifetime.