When did the U.S. government become more deeply involved in business than it had been previously?

The U.S. government became more deeply involved in business during the New Deal era in the 1930s, in response to the Great Depression. This period saw significant federal intervention in the economy through programs and regulations aimed at stabilizing the financial system, creating jobs, and supporting industries. Additionally, the post-World War II era further expanded government involvement in business, particularly through defense contracts and economic policies aimed at promoting growth and innovation.