linguistic:paraphrasing
Labor and education

Until the last 100 years, agriculture was labor-intensive. Farming was a common occupation and millions of people were involved in food production. Farmers, largely trained from generation to generation, carried on the family business. That situation has changed dramatically today. In America in 1870, 70–80% of the US population was employed in agriculture. As of 2021, less than 2% of the population is directly employed in agriculture, and about 83% of the population lives in cities.