Explain William Penn's role in the development of self government?

He and other quakers believed that everyone had to seek God in his or her OWN way.

Penn's role in the development of self government was he believed that everyone had to seek Gods in his or her own way. He also thought that religious tolerance - or "liberty of conscience" - would create stronger governments and wealthier societies. Other English thinkers in the 1600s shared these ideas.