This lesson introduces the concept of monopoly. It calls upon students to consider how monopoly power might affect the quality and price of goods and services offered to consumers. In light of what they learn about the history of trusts and the Sherman AntiTrust Act, the students write editorials, stating and explaining their views about laws prohibiting monopolies. Finally, students consider the effect that the Internet has had on the potential of companies to become entrenched as monopolies in our national and global economies.