““Throughout history the job market has been divided into three main sectors: agriculture, industry, and services. Up until 1800, most people worked in agriculture. During the Industrial Revolution more people worked in industry, with an increase in services. In the last few decades, the industrial jobs began to vanish, so all those people moved over to services. In 2010, 2 percent of Americans worked in agriculture, 20 percent in industry, and the rest in services. But what will happen to jobs in the 21st century?””