Death to all men.
It started with a simple message, delivered directly to the brain of everyone on the planet. No one knew who it was from, we still don't know. What we do know is that immediately afterwards 75% of all males died, including werewolves.
They died wherever they were. Driving, piloting civilian planes, teaching, serving food, giving sermons, tucking their children into bed.
They took lives with them. Innocent lives. Women, children, unaffected men. What was left, was sobering. Bodies, too many to bury, though we tried. Mass graves were created, mass burnings, we even dumped them into the sea.
But in the end, most bodies were sent to the desserts, to the mountains, to places uninhabited by beings, where nature claimed them back into the earth.
The message remaining was simple enough. If earth females didn't restrict the amount of testosterone on the planet, everyone would die. No more wars. No more rape. No more child abuse. There would no longer be a male dominated society.
Interesting plot concept...look forward to reading more.