Book excerpt: The U.S. Constitution traces the complicated evolution of our nation's most important document. From its roots in English political history through the Magna Carta and the writings of John Locke to early colonial treaties such as the Mayflower Compact and the Articles of Confederation, this volume vividly documents the challenges and difficulties in securing the "blessings of liberty." Challenging review questions encourage meaningful reflection and historical analysis. Tests, answer key, bibliography, and bonus timeline included.