A society is any organized group of people living together in a community, which typically includes some form of government, laws, social roles, and an economy. Key aspects of societies include military, architecture, cities, health, communication, government, timekeeping, record keeping, and language. Societies are impacted both positively and negatively by developments in agriculture, transportation, education, industry, energy resources, and communication. Metrics like GDP, banking and investments, trade indexes, resources, savings and expenditures, and social development are used to measure an economy within a society.