Keynesian economics
Keynes said capitalism is a good economic system. In a capitalist system, people earn money from their work. Businesses employ and pay people to work. Then people can spend their money on things they want. Other people work and make things to buy. Sometimes the capitalist system has problems. People lose their work. Businesses close. People cannot work and cannot spend money. Keynes said the government should step in and help people who do not have work.