Why does Romans 5:19 say "many" instead of "all"? (Overview)

> By one man’s disobedience many were made sinners > > Rom 5:19 Why does it not say "all" but "many"? Because the previous verse says: > By the offence of one judgment came upon all men to condemnation > > Rom. 5:18 Does this mean that not all were made sinners though upon all came to condemnation? I am interested in an overview of the major views in Christianity.