The most negative aspects of the Civil War is lots of death and destruction
It made the government way more interactive because president Hoover(the previous president) believed that the government should let the economy do its own thing and when Roosevelt tried to solve the problem it made the government a lot more human and a lot more involved
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.