[T.B. Yoits]

What do you think is the root cause?

It doesn't matter what I think, although it's not a singular "cause" but "causes".

See Post 16. Each of those scenarios accumulated, and at some point men realized that the only winning move was not to play, hence the "opting out".

[A_perfect_lady]

It doesn't matter what I think,

It does to me, if I'm trying to have a discussion with you.