What would men do if the 4b movement really took off?

I don't believe it will really happen, but for a fun hypothetical let's say 90% of women have zero interest in any kind of relations with men and never want to give birth. What would men do? I know it's dark, but if the alternative is letting the human race die out completely, could using force be justified? Or could the demands of women ever be satisfied peacefully?

What would men do if the 4b movement really took off?
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