An idea which, as I said, I believe to be supported by history.
Oh, people responded, but with indignant huffing and puffing, rather than any real argument.
I wasn't specifically talking about the US. However, the US population is only growing due to immigration, and a number of European countries definitely are undergiong a demographic implosion.
Explaining the consequences of a declining birthrate is a bit complicated, but I'll try to give the best short answer I can. A birthrate that isn't at least close to replacement levels (average at least 2 children per woman) means an aging population, which in turn means, as the proportion of the population above retirement age increases, a shrinking work force (and hence less productivity) as well as a larger retired population to care for. I found a
short article from the Rand Corporation which discusses the matter a bit. Also, such societies leave themselves more vulnerable to aggression from more virile neighbors.
The homosexuality of the ancient Greeks was different in many ways from the modern Western "gay" phenomonon. For men to mess around with other men in their younger years was tolerated, in some circles even approved of,
but it was still expected that a man would eventually marry and father children. There were no "homosexuals", or "heterosexuals" for that matter, as we understand by that term today. Homosexual desire was understood to be universal, not particuar to certain sexual minorities. Homosexuality was for before marriage, heterosexuality for after marriage. To say there were "no restrictions on homosexuality is far form the truth.
This was true of other cultures as well. Some societies, even after marriage, would look the other way at a man's "extracurricular activities" provided he fulfills his obligations of marriage and children. The West, however has long held that sexual energy should be directed toward marriage, and even today monogamous relationships are held as normative. If that's our cultural standard, then the only approach to homosexuality that makes sense biologically is to forbid it altogether.
On the other hand, if anybody actually wants to argue that we should imitate the ancient Greeks in there sex mores, feel free to do so. It would make for an interesting discussion.
By "homosexuality" do you mean homosexual identity?