Simplify the following text for a Grade 6 native English-speaking person.
Original: After secondary school Saddam studied at an Iraqi law school for three years , dropping out in 1957 at the age of 20 to join the revolutionary pan-Arab Ba ` ath Party , of which his uncle was a supporter .
Simplified: According to Saddam , in 1957 , at the age of 20 , Saddam became part of the Ba ` ath Party .