Prior to the Enlightenment, citizens viewed themselves as subjects of their governments, obligated to obey the mandates of the ruling class. Enlightenment thinkers argued that governments should serve their citizens, rather than citizens being servants of their governments. This had a constraining effect on the abuse of authority, but also led to a romantic notion of democratic governments being accountable to their citizens and acting in their interests, legitimizing the exercise of authority by the ruling class. This chapter discusses the historical evolution of democratic institutions to show how they emerged as a result of negotiations in a political marketplace. One advantage of democratic institutions is that the exercise of authority tends to rest with the positions people hold rather than with those people themselves. This mechanism for peacefully replacing those in authority constrains their ability to abuse their power.