William Penn obtained the land for his Pennsylvania colony because

King Charles I wanted Quakers to have a place where they could enjoy religious toleration.

he supported the crown during the Glorious Revolution.

the king wanted to cancel his debt to the Penn family and bolster the English presence in North America.

he conquered the Swedes and Dutch who previously had controlled the land.

his invention of what was then called the "penncill" made him incredibly rich.