Why didn't three of the men sign them constitution On September 17'1787?

Three delegates—Elbridge Gerry, George Mason, and Edmund Randolph—refused to sign the U.S. Constitution on September 17, 1787, primarily due to concerns over the absence of a Bill of Rights and the potential for federal overreach. Gerry and Mason believed that the new government might infringe upon individual liberties, while Randolph was worried about the lack of safeguards for state sovereignty. Their objections highlighted a significant debate over the balance of power between federal and state authorities.