Invention

Note: The date of invention is often controversial. The invention is generally invented almost simultaneously by several inventors or it may be unrealistic for many years before another inventor has improved the invention into a more practical form is there. In case of ambiguity, the date of the first known working version of the invention is used here. The dates described in this section refer to the earliest evidence of the present invention discovered and labeled by archeologists (or in some cases indirect evidence). The date is usually approximate, and varies as more studies are completed and reported and observed. Old examples of given technology are often seen. The listed place is the place where the earliest conclusive evidence was found, but it is almost uncertain as to how early the invention is, how close the invention is.

Criticism plays an essential role in social progress and innovation. For example, look at the invention of the wheel. Discussions on which civilization first invented it, but one of its earliest forms was discovered in ancient Mesopotamia (then) in 3500 BC. It is made of clay and works as a potter. Overtime, it has evolved into a wooden wheel that began to be used in tanks. Until the 19th century Robert William Thompson invented the rubber wheel, it remained relatively unchanged for thousands of years. This opens the door to the manufacture of tires for automobiles and bicycles.