The two races, God and Demon, were peak existences in the universe. They were known for being those closest to godhood and demonhood respectively, possessing combat power at levels that an average individual could not even imagine, dominating this piece of space.
Speaking of which, both the God and Demon Races were from the Law Realm, selected to join the elites due to their superb cultivation, exceptional combat strength, and even their remarkable technological prowess.
The Law Realm and the two peak races were inextricably linked, with plenty of close ties within, which was why some in the White Horse Constellation could qualify to enter the two races. White Ward, of course, had such qualifications since he was the patriarch of one of mankind's Nine Great Clans.