William Penn created the policy of religious tolerance in Pennsylvania.
Explanation:
In the United States, Quaker Christians, led by William Penn, founder and owner of the British colony of Pennsylvania, declared that anyone who believed in one God would be allowed to practice their religion, at times when there were severe religious restrictions in a very conservative society like that of the United States of the time where even Catholicism was frowned upon, and in which only Anglican religious expressions were allowed.
The attitude was to stay strong over what anyone else said about lack people so by staying strong and taking tons of valuable sacrifices they helped end slavery.
