The first ten amendments to the United States Constitution, known collectively as the Bill of Rights, was introduced by James Madison who had promised to come up with them as an inducement to convince delegates who worried about individual rights and usurpation of power by a strong central government. The purpose of this body of amendments is to enumerate the rights of citizens which Congress cannot abridge. Among those rights are freedom of religion, speech, association, due process, to keep and bear arms, to be secure in one's person and home.