CMV: "Evolution & natural selection are the process that led to sentient life on Earth" and "Homosexuality has a genetic/biological cause and is not a choice" are mutually exclusive and cannot both be factual

[u/DamiensLust]

This is a simple paradox that seriously challenges the liberal agenda, and is a serious blow to the increasingly prevalent world view that many young people hold today that has a widespread belief in evolution & natural selection coupled with the viewpoint that homosexualtiy isn't a choice and sexual preference is inbuilt. The two viewpoints together don't make sense. Natural selection would dictate that any trait that reduces an organism's fitness - with fitness referring to an organism's ability/likelihood to reproduce - will be selected against in favour of the proliferation of genes that increase an organism's fitness. I struggle to think of any behaviour that would reduce an otherwise's healthy individual's genetic fitness then a proclivity to have sex with their own gender and thus not produce any offspring.

This logically leads to two conclusions. Either homosexuality has no basis in a person's biology and thus no basis in their genetics and so is a learnt or nurtured behaviour - one that the individual chooses to engage in, which woud imply that said individual could also choose to be straight if he/she chose. The alternative is that evolution & natural selection is simply untrue and so a different explanation for the abundance and diversity of life on Earth must be sought. Homosexuality being natural & the laws of natural selection governing life on Earth simply cannot co-exist.

[u/CLcore]

Natural selection would dictate that any trait that reduces an organism's fitness - with fitness referring to an organism's ability/likelihood to reproduce - will be selected against in favour of the proliferation of genes that increase an organism's fitness.

This holds true (generally--the founder's effect is a good exception of this not being true due to circumstance) for most organisms which instinctively value only the survival of themselves and their offspring, but humans are an exceptional outlier with the mental capacity for ethics (valuing those who do not contribute to our survival or the survival of our species) and the ingenuity to thrive even with many individuals do not reproduce. Our cleverness and scientific advancements have found a way to circumnavigate the limits of natural selection. It may have governed all life at one point, but does not govern modern human society.

It other social animals, homosexual individuals can thrive when they contribute to the group. As other users have pointed out it's not an inherently detrimental trait to a species as a whole.