Williams is credited with helping to shape the church and state debate in England, and influencing such men as John Milton and particularly John Locke, whose work was studied closely by Thomas Jefferson, James Madison, and other designers of the U.S. Constitution. Williams theologically derived his views mainly from Scripture and his motive is seen as religious, but Jefferson's advocation of religious liberty is seen as political and social. Though no states currently have an established religion, almost all of the state constitutions invoke God and some originally required officeholders to believe in the Holy Trinity.