How did the rule of reason differ from new nationalism?

The rule of reason and New Nationalism represent different approaches to economic regulation and antitrust law. The rule of reason, established by the Supreme Court in cases like Standard Oil, suggests that not all business practices are inherently illegal; instead, they should be evaluated based on their overall impact on competition. In contrast, New Nationalism, championed by Theodore Roosevelt, advocated for a more active government role in regulating big business to ensure fairness and social justice, emphasizing the need for strong regulatory frameworks to curb corporate power. Essentially, while the rule of reason focuses on a case-by-case analysis, New Nationalism promotes broader regulation and reform.