The Teaching Company has a series about what they call the ‘Axial Age’.
Expanding the timeframe a bit and it is truly interesting that you have the Prophets Jeremiah, Ezekial, Isah and Daniel at nearly the same time as Confucius and Lao Tzu, and as Socrates, and Plato . Pretty much the basis of all philosophical thought for most of the world laid down within a couple of centuries. Most of the ideas with which humanity has contended with ever since.
Oops, *and* Buddha!
So the foundations of pretty much every belief system, along with the founding of Rome.