Well for one example we’ve managed to make a lot of progress expanding rights for LGBT people over the last 40 years without needing a gay holocaust to set the movement into action.
Likewise, women’s rights have generally trended in the right direction for the last century even though the United States didn’t experience a single moment when sexism hit an “extreme.”
In both cases, progress happened because people collectively came to the realization that the status quo was bad enough.