•republic •Articles of Confederation •Northwest Ordinance of 1787 •Shays’s Rebellion •James Madison •federalism •checks and balances •ratification •Federalists •Antifederalists •Bill of Rights American leaders created the Constitution as a blueprint of government for the United States. More than 200 years after its creation, the Constitution remains the nation’s guiding document for a working g...

This article presents an agent-based computational model of civil violence. Two variants of the civil violence model are presented. In the first a central authority seeks to suppress decentralized rebellion. In the second a central authority seeks to suppress communal violence between two warring ethnic groups.

This is the story of how a conventional middle-class American household?a surgeon, his wife and three normal children?had first to recognise, then to cope with and, finally, to exclude, an abnormal family member. Tony was a beautiful child, the eldest, and apart from long hours of screaming for no apparent reason, he seemed a normal baby. His intellectual and motor development was average, but ...