Caesar was only one of the titles Augustus bore. Others were rex, imperator, princeps, pontifex maximus, and so on. He ruled Rome and thus virtually the whole civilized world. He was worshiped as a god. People burned incense to him. Insofar as he is remembered at all, most people remember him mainly because at some point during his reign, in a rundown section of one of the more obscure imperial provinces, out behind a cheesy motel among cowflops and moldy hay, a child was born to a pair of up-country rubes you could have sold the Brooklyn Bridge to without even trying.