If my memory serves me well, the Federal Trade Commission act made sure that antitrust laws were enforced and also protected small businesses so that they had a chance to survive against powerful corporations. FTC is needed to prevent unfair methods in trading competition. This allowed small businesses to compete with large corporations. FTC eliminated anticompetitive business practices, like coercive monopoly.
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The impact of the United States joining the war was significant. The additional firepower, resources, and soldiers of the U.S. helped to tip the balance of the war in favor of the Allies. When war broke out in 1914, the United States had a policy of neutrality.
According to Thomas Hobbes individuals ceded some of their individual rights - natural freedom - for the security that a government would cause. This created the State, an entity that would protect them by creating laws to regulate social interactions.