Of all the differences between the Old World and the New, this is perhaps the most salient. Half the wars of Europe, half the internal troubles that have vexed European States... have arisen from theological differences or from the rival claims of Church and State. This whole vast chapter of debate and strife has remained virtually unopened in the United States. There is no Established Church. All religious bodies are equal before the law, and unrecognized by the law, except as voluntary associations of private citizens.