Evidence

http://marquee.blogs.cnn.com/2011/01/03/brad-angelina-donate-2m-to-namibia-charity/?iref=allsearch
Brad Pitt and Angelina Jolie donated two million dollars to a mission in Nambia.  The mission aims to conserve the land, cultures, and wildlife of the African county and to rescue species threatened by the shrinking habitat.  The charity also works  to improve the lives of the San Bushman community in Namibia through better education, employment, healthcare and improved living conditions.
    This donation made by the couple was a very generous thing for them to do.  They gain nothing by donating the money, but they are able to change the lives of many.  They did what they thought was right.  Because of their morals they chose to donate money to help others in a land far from theirs.  This generosity shows human nature at its best. 

http://www.oskarschindler.com/ 
Oskar Schindler saved the lives of 1200 jews during the holocaust by employing them in his enamelware and ammunitions factories in Poland.  He did everything in his power to keep them safe, using all of his money to protect them, and even risking his own life.  There is nothing that could be gained by him, actually there is a lot that could have and was lost.  He did what he thought was right.  He spent millions to protect and save his jews, he died penniless.  Human nature is governed by morals, these morals are what led Oskar Schindler to saving the lives of 1,200 jews.

http://www.boston.com/business/healthcare/articles/2011/01/09/krafts_give_20m_to_draw_doctors_into_community/
Robert Kraft, owner of the New England Patriots football team donated 20 million dollars to Partners Healthcare.  This is a huge donation that will likely help many.  Robert Kraft gained nothing by donating the money.  He donated because he felt that it was the right thing to do, because of his morals.