Gillian, your comments avoid the astronomical point of my claims. There is in fact a general pattern of what I will call Gaian history with precise cycle period 2147 years. I included a link to a good picture of this Gaian temporal structure at http://www.perceptions.couk.com/precess.html This cycle has been going on since the origin of life on earth with stable structure. And, as explained in my most recent discussion, the 2147 year structure is a physical function of the relation between the outer planets and the sun – the earth is like a gyroscope in the solar system. So, the period is real, and the question is whether there is evidence for it in history. This evidence can range from exact parallels between events such as Zama and Normandy or the Western invasions of Carthage and Baghdad to much broader possible resonances. The point is that the sum of causes of historical events includes this general pattern of terrestrial time. There are some good examples in the USA/Rome comparison and some that are weaker. Because you are disposed to ignore precession as a framework of history, you focus on those I have mentioned that are weaker rather than stronger.

Again, this is a misunderstanding. It is analogous to you saying that because snow fell first in November one year and in January the next that the cycle of the year does not exist. Of course we know the year exists. My point is that the precession has equal temporal status to the year as a structure of time. America and Rome often are in fact compared in history, through ideas such as the Pax Romana and the Pax Americana. I am simply taking this as the biggest imperial comparison between ages that exists in our world and asking if we can see parallels with phase 2147 years. In some cases these parallels are precise, in others broad.
America-Rome is just an example. Of course there are likely to be other parallels and the basic reason for this thread is to develop an understanding of wider world causal processes against a cosmic context. I pick on America and Rome because they have a cultural continuity and have major stark dates as world powers. The greater the cultural distance between two powers the less the causal connection. As I mentioned, the modern parallels I am noting are between the West and Ancient Rome, with some examples drawn from the USA and others from the UK and Europe. The whole modern West, unlike the Mayans, is joined to Rome by language, law, history, blood, religion, etc. Even so, there may well be deeper connections which link different parts of the world. I only raise this in response to your mention of the Mayans, who really had no direct institutional link to the USA by comparison with Rome. An example of a cross-continent comparison of the sort you seem to be asking for might well be that drawn by a respondent between Buddha and Calvin. Both codified a world folk religion, with Buddha refining Hinduism into Buddhism and Calvin refining Catholicism into Protestantism. However, as I said in response to the criticism of the comparison of Plato and Kant, I think it is easier to see the cycle of precession operating at world-historical than at individual level.
Broader world. And this is about millennial cycles which could well have decades variance in their return. You are welcome to look for connections between unconnected cultures, but I think these are less likely than between the US and Rome. With the Germany-Carthage comparison, my point is that at the same stage in both their history, having cleared the neighbourhood, the US and Rome went to war to defeat a counter-hegemon. The parallels include the broad multi-decade phase I have called ‘defensive war’ and specifics such as 202BC=1945 and 146BC=2001AD.
See above.