Written by Rhodes Scholar Sherif Girgis, Heritage Foundation Fellow Ryan T. Anderson, and Princeton Professor Robert P. George offer a powerful critique of the idea that equality requires redefining marriage. Originally they published and article back in 2010 that argued marriage as being between a man and a woman. It was hailed internationally as being the toughest and most eloquent argument that was pro-marriage - that marriage unites one man and one woman. The authors have developed their arguments further and have also responded to critics in this expanded edition. What Is Marriage?: Man and Woman: A Defense