Calvinism, based on the ideas of John Calvin, is a massive religion today, with widespread church affiliations. In this Very Short Introduction, Jon Balserak explores how Calvinist ideas and practices arose, spread, and took root. Considering its influence on modern thought on everything from theology to money, politics, and the arts, Balserak also combats some of the common misconceptions about Calvinism, and outlines the Calvinist understanding of God, the world, humankind, and the meaning of life. He also addresses Calvinism in a twenty-first century context and considers the challenges it faces today.