Why Ideology Exists

Understanding the role of ideology is of fundamental importance for understanding social dynamics since the rise of the state 5,500 years ago. Yet this importance has not received adequate attention from social scientists and historians. Even when addressed, it most often has suffered from imprecise meaning and a failure to clearly specify why it is effective. Following the usage by Karl Marx, this article defines ideology as an instrument of exploitation, which enables the stronger to persuade the weaker to support behavior and institutions that are counter to their interests. Exploitation exists because humans are biologically driven to compete for status, which provides them with reproductive advantage. What ultimately drives competition among all species is the struggle to send one's unique set of genes into posterity. The biological ancestors of all currently living beings did so successfully. This article surveys how this biologically driven struggle eventually led to weapons and social organization that enabled the stronger to subjugate and exploit the weaker. Ideology evolved as religion was transformed to justify this exploitation by depicting it as in accord with cosmic forces. Ideology provided a more efficient means of maintaining exploitation than violence. With the rise of capitalism, secular doctrines, and especially political economy and then economics, joined and eventually mostly replaced religion in serving as ideology justifying exploitation.