the leavenworth constitution was one of four kansas state constitutions written during the era of bleeding kansas. the leavenworth constitution was written by a convention of free-staters. it was the most progressive of the four proposed constitutions. important parts of this constitution were a bill of rights that referred to ""all men" (making no distinction between the rights of white men and black men), making slavery in the state illegal, and a basic framework for the rights of women.