The world is in a challenging time today with all the conflicts and wars going on in many parts of the world, as well as the serious existential threats of climate change and sustainability issues.

There is much that humankind can learn from how these great civilization were built. There is also much that we can learn from how some of these are kept alive, vibrant, and vital to this day; and how some of them have failed and disappeared in the long history of humankind.

Humankind can only deal with all these problems successfully if we learn from the past mistakes and achievements of the many great civilizations that humankind has built around the world, and plan to do better for the future.