The American Civil has claimed more American lives than all the other wars put together. Lincoln wasn’t originally an Abolitionist, as many of the Founding Fathers were slave owners themselves. But, when Slavery became leverage over the Confederates, the Civil War became a moral rather than a political struggle. The American Civil War expedited the emancipation of slaves in the United States. Without this destruction, the massive shortage of troops, the shortage of skilled labor and consumers, Black emancipation could have taken 100 more years.
40 million died in World War I. As Men fought on the frontlines, women manufactured munitions. When the War ended, the British Parliament gave women the right to vote.
The 4th Industrial Revolution and the Pandemic bring crisis, but they also bring their own positive change. You choose where you want your people to focus.