Marcel Mauss 
Gift [PDF ebook] 
The Form and Reason for Exchange in Archaic Societies

In this, his most famous work, Marcel Mauss presented to the world a book which revolutionized our understanding of some of the basic structures of society. By identifying the complex web of exchange and obligation involved in the act of giving, Mauss called into question many of our social conventions and economic systems. In a world rife with runaway consumption, The Gift continues to excite and challenge.