The New Deal restored a sense of security as it put people back to work. It created the framework for a regulatory state that could protect the interests of all Americans, rich and poor, and thereby help the business system work in more productive ways.
Women began playing a large role in the workforce
International trade enables specialization, which brings increased efficiency and greater competition to spur the market.
This happens because Specialization would make each nation to focus on producing certain type of products in which they would gain a competitive advantage towards other (either because they had the necessary materials sources or labor qualities) and would create better and cheaper product in the market.