In 1681, King Charles II handed over a large piece of his American land holdings to Penn to pay the debts the king owed to Penn's father. This land included present-day Pennsylvaniaand Delaware. Penn immediately set sail and took his first step on American soil in New Castle in 1682 after his trans-Atlantic journey.
The theory that taught only the strong survived
Peaceful relations with neighboring American Indian groups and fertile farmland helped Penn's experiment become a success. Philadelphia grew into one of the most important cities in colonial America, becoming the birthplace of the U.S. Constitution.