Many destructive business leaders drive their companies into bankruptcy and dissolution, never to be heard from again in the business press. However, it is useful to study these organizations to prevent the same, or similar destructive business from taking on, and destroying, additional businesses. In this article, we describe one type of organization that follows the model of religious cults, which we call secular business cults. Building on Padilla et al., we describe an SBC toxic triangle of (1) Padilla et (...) al.'s societal factors, (2) additional business factors, and (3) antisocial actors that set the stage for the SBC's emergence. We then describe the characteristics of the SBC's operations, such as an ultrastrong culture, formalized manipulation, manipulative hierarchical relationships, competition, and operations efficiency tools, and the frequent overcommunication of deceptive messages. It is our hope that this unique perspective on organizations will inspire research into an overlooked area of unethical behavior in businesses today. In our Part II paper on the topic, we intend to extend the idea of SBCs to manipulative businesses, which are essentially reorganized, well‐established and legally‐complying revisions of SBCs, and then to manipulative industries and societies. (shrink)