How many times do we have to repost answers to your questions?
The World History Of Male Love Library
Study by Denis Werner, claiming homosexuality developed as an adaptive trait
shared by the higher primates. Different constructions of homoerotic expression ...
http://www.androphile.org/preview/Library/Articles/
Homosexuality, Birth Order, and Evolution:
Towards a Equilibrium Reproductive Economics of Homosexuality
by Edward M. Miller, PhD
Department of Economics and Finance
University of New Orleans
New Orleans, La. 70148
emmef@uno.edu
Archives of Sexual Behavior No. 29 (February 2000) No. 5, 1-34
http://www.lrainc.com/swtaboo/stalkers/em_homosexuality.html
Abstract
The survival of a human predisposition for homosexuality can be explained by sexual orientation being a polygenetic trait that is influenced by a number of genes. During development these shift male brain development in the female direction. Inheritance of several such alleles produces homosexuality. Single aleles make for greater sensitivity, empathy, tendermindedness, and kindness. These traits make heterosexual carriers of the genes better fathers and more attractive mates. There is a balanced polymorphism in which the feminizing effect of these alleles in heterosexuals offsets the adverse effects (on reproductive success) of these alleles contribution to homosexuality. A similar effect probably occurs for genes that can produce lesbianism in females.
The whole system survives because it serves to provide a high degree of variability among the personalities of offspring, providing the genotype with diversification, and reducing competition among offspring for the same niches. An allele with a large effect can survive in these circumstances in males, but it is less likely to survive in females.
The birth order effect on homosexuality is probably a byproduct of a biological mechanism that shifts personalities more in the feminine direction in the later born sons, reducing the probability of these sons engaging in unproductive competition with each other.
http://www.madsci.org/posts/archives/jun2000/960498851.Ev.r.html
There is also evidence of homosexual activities playing a role in maintaining dominance heirarchies, reinforcing familiarity, and playing other roles in organizing and maintaining the societies of some of the more social animals. While the absolute evolutionary value of homosexuality varies greatly between species, it is certainly common enough to suggest a contribution to fitness, even if not directly measurable.
http://emporium.turnpike.net/C/cs/hscom.htm
Evolution and Communism
Another interesting facet of history is the connection between evolution and communism. With communism the struggle of "race" is replaced by the struggle of "class" as history is viewed as an evolutionary struggle.
Both Karl Marx and Friedrich Engels were evolutionists before they encountered Darwin's "The Origin of Species" - (Dec 12, 1859) Engels wrote to Marx: "Darwin who I am now reading, is splendid" (Morris 1989, 83 quoting Zirkle). Like Darwin, "Marx thought he had discovered the law of development. He saw history in stages, as the Darwinists saw geological strata and successive forms of life... In keeping with the feelings of the age, both Marx and Darwin made struggle the means of development" (Morris 1989, 83 quoting Borzin). "There was truth in Engel's eulogy on Marx: 'Just as Darwin had discovered the law of evolution in organic nature so Marx discovered the law of evolution in human history'" (Morris 1989, 83 quoting Himmelfarb).
There is no evidence for genetic inheritence of homosexual tendencies at this time.
Social Darwinism is the same sort of misinterpretation of science as creationism is of the Bible. Hitler and Ken Ham have a lot in common if your ideas are true.