What the Bible says

The social gospel

World view and responsability: Worshipping the Creature Rather Than the Creator; Greg Bahnsen

The psychology of giving

Emotions versus statistics

Books:
Rich Christians in an Age of Hunger; Ronald J. Sider
Good News to the Poor; Tim Chester
Heart, Soul,and Money; Craig L. Blomberg
Through the Needle's Eye; David A. Servant
The New Evangelical Social Engagement; Edited by P. Goff and     B. Steensland
Charity Detrox; Robert D. Lupton
Toxic Charity; Robert D. Lupton
When Helping Hurts; Steve Corbett and Brian Fikkert