Eighty percent of millionaires in America made their fortunes in one generation. They did't inherit their money from their family. Most of them own a business. Two-thirds of them are self-employed, often in blue-collar industries, where you don't need to wear a suit. They are roofing contractors, dry cleaners, and scrap-metal dealers. These people were not the A students in high school; they were the B and C students.