Oh man, there we go, another weak villain that lacks motivation. You wanted to live long so you just invented immortality, yet your reaction to war is "welp, humanity is doomed, let's have them all lose their free will"?
He controls world leaders, he could have made international pacts to advance humanity, but instead it regressed, people aren't as good at magic as they used to be because he somehow couldn't see the demons' influence and event though his best friend the amber eyed couldn't live a good life because of the stigma against amber eyes he didn't get rid of that either. He just pouted for hundreds of years, waiting for his big bro to come back.
Not worth being a main character. Next.