Part I detailed the forces behind philanthropy in the United States: http://keepmetaxfree.com/2012/05/24/the-united-states-philanthropic-milestones/ Part II illustrates the historical context of philanthropic initiatives   1921   Private Foundations recognized in the tax code through the Revenue Act of 1921 1934   Congress allows nonprofits to lobby but not to engage in political activity: http://www.preservationnation.org/take-action/advocacy-center/lobbying-101/lobbying-rules-for-non.html#.T7_tX46oRak 1935   Revenue Act of 1935 […]