There are more people who are governed than who does the government. Governing with people's liberties is what makes the country thrive along with its economy and the conditions of the civilians livelihood. Additionally, impeding upon your publics rights for the sake of securing a kind of tyrranical rule over people, will always result in an overthrowing by the public.
He did that because rome started to fall and was taking pressure by north countries.Byzantium was the best solution because of it's geographic location and it could control the trade
