If there was overpopulation of the planet, could it be possible that "nature" would make more people gay/lesbians in order to decrease the population? (I guess bi would help too but not necessarily much)
Not sure if this is clear but it is a question I have often wondered about but I could not find an evolutionary reason why it would be so and this lots of you know much more than I do, I'm asking! Hope I'm not too late though
I think one of the things to consider with this hypothesis is what is the signal that indicates an area is "overpopulated", and how should members of the species respond to that signal? And how can this signal be distinguished from other causes? For instance, an organism that has offspring that are unable to reproduce because they had limited resources will likely be outcompeted by an organism that produces fertile offspring regardless of the availability of resources.
If you open up a variable that determines how likely your offspring are to reproduce, it also could become an attack vector for other competing species to trigger. Imagine a species that sends out the signal for your species that you are overpopulated, but ignores that signal itself. I think you will quickly find your species going extinct in such a scenario.
Personally I think a more compelling reason for species who sometimes can't or won't have biological offspring is that it frees up their time and energy to focus on things other than child rearing in the larger community. If instead of having a variable that determines how likely your offspring want to naturally reproduce based on the currently available resources, you have a fixed percentage, then the communities that descend from you might outperform communities that focus more on child rearing at the expense of other activities (research, sentries, hunting, protecting relatives etc).
Consider that if the fixed percentage hypothesis is correct, then a natural consequence of population growth is a growing number of LGBTQ+ members of the population.
Not everyone who is not having kids is doing it to free up time. Lots of children need homes and some of these communities have dreams to still have kids, which is given foster and adoptable children, places to go. Choices based on culture is not always obvious. Most people who are gay aren't thinking, oh the worlds over populated lets put our focus in something else, most people are discouraged from children due to experiences in life. For me, over population bothers me because I had a bad experience in life period, especially as a women growing up with w... (read more)