wickard v. filburn dramatically changed congress's authority to regulate economic activity in the united states.

Wickard v. Filburn dramatically expanded Congress’s regulatory power under the Commerce Clause, establishing a key aggregation principle: even activities that are local and not in themselves subject to interstate commerce can be regulated if their cumulative effect, taken together with similar activities by others, has a substantial economic impact on interstate commerce. This ruling thus significantly broadened federal reach over economic activity in the United States.