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According to archaeologists, the wheel was invented around 4000 BCE probably independently and nearly concurrently in Mesopotamia (in present-day Iraq), the Northern Caucasus and Central Europe. Estimates on when this may have occurred vary from 5500 to 3000 BCE with most experts placing it closer to 4000 BCE. The oldest artifacts with drawings depicting wheeled carts date from about 3500 BCE; nevertheless, the wheel might have been in use for millennia before these drawings had been made. More lately, the oldest-known wooden wheel in the world was found in the Ljubljana Marsh of Slovenia. This article is concerning the use and data of strategies and processes for producing goods, services, and outcomes. The Gatehouse as quickly as served as the doorway to the Stevens household residence – a 40-room Victorian mansion is conscious of because the "Stevens Castle." On the somewhat pessimistic side are certain philosophers like the Herbert Marcuse and John Zerzan, who believe