Civilization is defined as a complex human society with certain cultural and technological developments, usually consisting of multiple urban settlements. Key elements that comprise civilizations include organized groups of people and their shared culture, a centralized government or state, a system of writing/literacy, established religion, praiseworthy moral traits, and advanced technology. All civilizations exhibit large population centers, monumental architecture/art, common languages/symbols of communication, bureaucratic government administration over territories, division of labor among specialized roles, and social/economic class structure. Civilizations represent the highest level of human cultural and societal development.