The document discusses different levels and types of economies. It outlines three levels of economic development: 1) the primary sector involving agriculture, fishing, mining, etc., 2) the secondary sector involving manufacturing, and 3) the tertiary sector involving services. It then describes three main types of economies: 1) a command economy where the government controls economic decisions, 2) a free market economy where individuals control decisions, and 3) a mixed economy with elements of government and private control. Command economies have generally failed while free markets have been most successful, though most countries now utilize mixed models.