id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-7578		Human - Wikipedia			.html	text/html	23827	4069	67	Agriculture and sedentary lifestyle led to the emergence of early civilizations (the development of urban development, complex society, social stratification and writing) from about 5,000 years ago (the Bronze Age), first beginning in Mesopotamia.[81] The Scientific Revolution, Technological Revolution and the Industrial Revolution brought such discoveries as imaging technology, major innovations in transport, such as the airplane and automobile; energy development, such as coal and electricity.[82] With the advent of the Information Age at the end of the 20th century, modern humans live in a world that has become increasingly globalized and interconnected. These can be a common set of traditions, ancestry, language, history, society, culture, nation, religion, or social treatment within their residing area.[347][348] Ethnicity is separate from the concept of race, which is based on physical characteristics, although both are socially constructed.[349] Assigning ethnicity to certain population is complicated as even within common ethnic designations there can be a diverse range of subgroups and the makeup of these ethnic groups can change over time at both the collective and individual level.[350] Also there is no generally accepted definition on what constitutes an ethnic group.[351] Ethnic groupings can play a powerful role in the social identity and solidarity of ethno-political units.	./cache/en-wikipedia-org-7578.html	./txt/en-wikipedia-org-7578.txt