Cancelled sabofgasafaf

I want you to imagine a world in the future. A future that has seen a third World War. A future where the technology is 5 times more superior than ours. But now imagine that future's people at the brink of extinction. Imagine their technology now completely useless after 99% of the population had died. What would that world look like?

A calamity called the Impact granted human survivors unnatural abilities that get stronger the less humans there are. And unlike in the past, wars wouldn't be waged for wealth or land, they would be waged to get stronger and dominate the world. Our MC hates the thought of his species facing extinction. And so, he follows two goals; taking revenge against his brother that betrayed him, and making sure that humans don't cause their own extinction because of greed.