system
A chat on subreddit /r/PoliticalCompassMemes
human
Mostly environmental huh?  Well, that's interesting.  Sounds like there's a risk children can be groomed into this sort of thing.
gpt
My point is I don’t know. 

For example 

The fetal androgen theory that tries to explain why the younger male siblings are more likely to be gay would count as environmental. 

There are also differences in how siblings are raised relating to birth order. That’s also environmental. 

If you were so inclined to want to increase or decrease the likelihood of your kid being gay, the first theory offers you no means to do that. The second one might. 

I’m not sure how you might determine which contributes more if you study this sort of thing. 

My recollection is that more sex separation in a society correlates with more same sex sexual behavior. 

I also imagine how you construct the concepts might affect how you behave.