At the present stage of human civilization, universal mating summons the courage to defy the prohibitive philosophies of racial barriers, caste separations, and color hierarchies. Interracial procreation is an act of courage in apartheid and racist societies. It is mission impossible in caste-bound communities.
Buried in the oral argument transcript of the Proposition 8 case is a potential revelation of how Justice Kennedy might be thinking: Don't think of it as "gay marriage" but as "same-sex marriage." Discrimination on the basis of sexual orientation isn't the problem; gender discrimination is. Wait, what?