A sweeping financial history that traces how American attitudes toward borrowing and lending evolved from the Civil War through the late twentieth century, showing how credit shaped industrial growth, political choices and everyday life; it follows the rise of bond markets, investment banking and corporate finance, the creation of national securities markets, recurring panics and regulatory responses, and the later expansion of consumer credit and leveraged finance. By profiling key episodes and personalities, the narrative links cultural beliefs about trust and solvency with the technical innovations and policy shifts that transformed credit from a localized, relationship-based practice into a mass, market-driven system — for better and for worse.