Thank you! And yes, I think the shortest timespan for any one line of the table is a couple hundred years, and some are rather longer. Some folks might argue that our Civilization is going through its stages a bit faster than most historical times, whether due to industrial or mass communication technology, or for some other reason - for example, if you see the 20th century dictators as evidence of the "Caesarism" phase, we were ~50-100 years ahead of schedule.