The River Valley Civilizations that we have discussed so far are of Egypt, Mesopotamia, China, and India. Some similarities that these civilizations share are their agriculture, their religion, all polytheistic, and that they all had interesting architecture. Also, India and Mesopotamia both had grid-like building systems for their cities, which means that their city structure looked more modern. A few differences between these civilizations are that, while Egypt, Mesopotamia, and India all grew basic crops such as wheat and barley, China’s primary food source consisted of rice and millet. Another difference is that all the civilizations hunted their food except for India, who felt that animals were sacred and not to be hunted. Some basic characteristics of all the civilizations include art and culture, demonstrated by the paintings, writing systems, weaving, pottery, sculptures, jewelry, and more. Other characteristics include government, with most of them closely linking to religion with the exception of Egypt and China, architecture, such as buildings, pyramids, and ziggurats, and science, demonstrated by inventions and technology like weapons, the study of astronomy, geology and countless others.