The Africonomics Theory of Economic Cycles (ATEC) presents a natural-moral framework for understanding one of the most destructive phenomena in modern economies: recurring boom-bust cycles. While traditional economic theories view these cycles as natural fluctuations within market economies, Africonomics demonstrates that they are not natural market phenomena, but rather a structural injustice caused by fiat monetary manipulation—artificial credit creation and interest rate suppression that enriches elites while impoverishing the majority. By distorting interest rates, misallocating capital, and incentivizing speculative investment, fiat monetary systems instigate artificial expansions that inevitably collapse into recessions or depressions—causing widespread instability and impoverishment. Through historical and contemporary case studies, including the Mississippi Bubble, the Dot-com and subprime mortgage crises, and the Angolan debt-fueled downturn, this paper reveals that fiat monetary systems generate recurring boom-bust cycles and chronic instability. Africonomics also offers a principled framework for ending these destructive cycles through the establishment of sound money and honest credit grounded in natural-moral law.