In 1649, Maryland passed the first law in English America to use the words "free exercise" of religion — a narrow, conditional, but genuinely remarkable order that quarreling Christians leave each other in peace. It was a fortification thrown up in a hurry by a Catholic lord losing his grip: the King beheaded, the charter worthless, a Protestant majority filling his colony. And in a bitter irony, the law was Protestant toleration of Catholics, passed by the very majority that would, within six years, repeal it.
This is the story of how the high-water mark broke. Of the Puritans whom Catholic Maryland welcomed after Anglican Virginia expelled them, who built a town called Providence on the Severn — and who, once the English Civil War put the wind at their backs, repealed the toleration, outlawed the Catholic Mass, and took up arms. On March 25, 1655, English settlers fought each other in a pitched battle for the first time on American soil, on the bank of the Severn. The proprietor's force was routed; four prisoners were executed. The refuge would be clawed back by lawyers within two years — but the Severn had shown what the peace really rested on, and how easily it could be broken.
A truce that bent to power every time — written by the weak, repealed by the strong, and demanded back by whoever was losing. And another revolution was already coming.