Humans have lived for much, much longer than the approximately 10,000 years of settled agricultural civilization.
Howard RheingoldCommunication media enabled collective action on new scales, at new rates, among new groups of people, multiplied the power available to civilizations and enabled new forms of social interaction. The alphabet enabled empire and monotheism, the printing press enabled science and revolution, the telephone enabled bureaucracy and globalization, the internet enabled virtual communities and electronic markets, the mobile telephone enabled smart mobs and tribes of info-nomads.
Howard RheingoldOf course, with agriculture came the first big civilizations, the first cities built of mud and brick, the first empires. And it was the administers of these empires who began hiring people to keep track of the wheat and sheep and wine that was owed and the taxes that was owed on them by making marks; marks on clay in that time.
Howard Rheingold