Reformed churches began during the Reformation in Switzerland and were greatly influenced by the teachings of John Calvin. They came to America during the great immigration of the Dutch and German and as early as 1628 there was a Dutch Reformed Church in what would be New York City. Gradually churches became more "Americanized" as the movement spread. Today the church emphasizes the need to be obedient to the will of God, which includes active participation in social justice. Therefore, they are active in social issues (and encourage their members to be also) such as genetic engineering, immigration, alcohol, the environment, gun control,etc.