The civilization gene reveals some interesting things about gay marriage. I will not discuss the idea that marriage is an institution for the benefit of children. That is accepted as the ultimate truth, though there are exhaustive facets of this truth to explore.
There is a functional aspect to requiring spouses to be a man and a woman. Animals have a natural inclination to care for their genetic young where they may or may not care for the other young of their species. Humans share this inclination as displayed by psychopaths. A gay couple could have one, or in the case of adoption, zero genetic parents with a hard wired predisposition to care for their young.
This is only a problem for gay couples who happen to have one or two psychopaths in the couple, who want to raise children. Non psychopaths are inclined to care for children simply because they human. It’s a side effect of having a conscience (not a psychopath), gay or not.
It’s not helpful that psychopaths tend to be more prevalent in the gay community. Increasing the chances that a psychopathic gay may be given custody of a child. Both child rearing and marriage can have financial and social benefits for the unscrupulous, attracting psychopaths of all three emotional stages.
One main reason that psychopaths like to spend their time in the gay community is the lack of social support from society at large. Abused gay partners and spouses are treated as if ‘they deserved it’ by their community. So the community’s prejudice resulting from observing more psychopaths among gays, also creates the situation where someone who sees sex as a simple bodily function (most psychopaths) can hide out in the gay community avoid discovery and consequences. The prejudice is self feeding in this society.
Coming back to non psychopath gays (doubtlessly most of them) simply having a conscience gives them the ability to love a child in a way that will benefit them as if it were from their genetic parent, dwarfing simple animal genetic ‘love’. The adopted parent(s) can both help shape the child’s emotional map, and empart non-rational aspects of their own conscience and it’s benefits to the child. In fact the civilization gene indicates wonderful hope for the success of adoption in general. That the attributes of the child (patience, IQ, stamina, etc) can be no more important than simply having a loving parent to help forge a versatile accurate metamind (aka:conscience). This explicitly includes empathic gays.
The recommendation for any society suffering from prejudice is to actively seek out and shun psychopaths among their ranks. Prejudice is dull weapon wielded against societies and cultures that mimic the behavior of psychopaths. It seems as though this cultural influence comes directly from actual psychopaths. Dismiss and shun them and the prejudice will be damaged.