Ryan Anderson, co-author of What is Marriage? explains what President Obama got wrong about marriage and the Declaration of Independence's pledge in his inaugural speech:
"...Being created equal doesn’t entail or require redefining marriage. Every marriage policy draws lines, leaving out some types of relationships. But equality forbids arbitrary line-drawing. Determining which lines are arbitrary requires us to answer two questions:1) What is marriage?
2) Why does it matter for policy?
Reflecting on these questions reveals why there’s nothing “equal” about redefining marriage to eliminate the norm of sexual complementarity. Indeed, there are many good reasons why citizens in 41 states have said over and over that marriage is between a man and a woman. Marriage exists to bring a man and a woman together as husband and wife to be father and mother to any children their union produces. And as ample social science has shown, children tend to do best when reared by their mother and father." (Heritage)