The correct answer to this open question is the following.
I think certain themes apply to civilizations separated by thousands of miles and hundreds of years because humans tend to live similar issues and circumstances that made them make decisions conducive to solve problems, although many different ways of thinking oppose a single way to resolve things.
Communities and nations also have had to establish contact and trade relations with other cultures. Some by will others by force, war, or conquest. All these factors allowed the exchange of culture, values, and traditions between different nations that were carried along many years. That is why they are still presenting in different, tines, eras, and places of the world.