Keynes was one of the most famous economists in the 20th century. He put forward the famous Keynesianism, which has a far-reaching impact on the development of modern macroeconomics. An example is a young man who has always dreamed of becoming a successful investor, but he has never received a formal investment education. One day, he heard the name of Keynes and decided to read his works. Keynes's works had a far-reaching influence on his investment thought, and he began to read a lot of books on investment and began to practice. In the end, he became a successful investor and created an amazing return on investment.

"Selling Sugar Water"-Friedman

Friedman is another famous economist, and his book Free Choice has a far-reaching impact on the development of economic liberalism. One example is a young girl who can't find a job after graduating from college. Her parents advised her to sell sugar water. Girls like selling sugar water very much, but they don't know how to run a business. So she went to Friedman's class and studied marketing and entrepreneurship. Through her own practice, she not only learned how to make sugar water, but also learned how to promote it, thus achieving business growth and profit increase.