We always seem to wonder at some point in us as to why we are the way that were. Why do we behave in a very certain method that others don't? Why is it that I and my sibling or my best friend has different likes, choices and hobbies? And most importantly, exactly why are we different from the other person in any way? Hydraulic civilization could be the earliest kind of ancient civilization mostly associated with the role played by massive water bodies. Focusing on Egyptian and Mesopotamia civilizations, it is clear that the water was the true secret consider the growth of cities, innovations for everyone individuals?s needs in addition to trade to get lacking commodities. This essay will therefore explore the hydraulic Egyptian and Mesopotamia civilizations. For centuries, saltpeter may be combined with food given it?s a preservative. Before the invention of the refrigerator, kitchens routinely salted meat to hold it edible throughout the long winter time. Today, the traditional cans of corned beef still contain saltpeter ? it has been man?s friend when used in moderation. Saltpeter first emerged in China about 2,000 years ago. Early experiments saw Chinese chemists having the best along with the worst results, according to your point of view. The compost heaps containing decomposing organic matter were covered and spiked with dung and urine. When the resulting "mess" was filtered and wood ash added, this became wonderful fertilizer and also the foundation of fireworks for celebrations. Later, naturally, it made explosives for war.