The Aussies seem to be a little bit uptight now. He didn't even mention anything about your sisters or mothers. That is a joke so smile. Guys don't get all bent out of shape if someone doesn't think you "culture" influences the world enough. Doesn't mean that you don't have a great country, just how he sees the impact it has on the WORLD.
Now let me throw in 4 cents, I am very opinionated.
Two "requirements" that I really see that impact whether a civ should make it or not: longevity and cultural impact. Maybe the production of a "Great Leader" like Genghis Khan. (For justification of the mongols)
I am American so I know more about "Native American" cultures and civs than someone across the pond. I do agree that the Iroquois should not be a civ, but instead should be all of the Native American tribes together. Upsetting that some of the Great Leaders and cites they have for the Iroquois aren't. The Horseman Rider UU they have wouldn't relate to the wooded lands around the Great Lakes and Northeaster US.
Aztecs did have a great culture sort a speak. Great temples and weapons, architecture. Thinking great weapons? Blades. Yes, there were great metal forgers. Had some of the strongest metal weapons in the world beause of their unique forging process. Blades vs. Guns = No Contest! And they were located in central Mexico, so whoever said maybe have a Mexican civ, please do some more history research first. They had an impact on this side of the world and Europeans did take back to Europe many new ideas and discoveries that came from peoples in NA. They had more impact than many realize. Because of the proximity with the Mayans, only one will be able to exist.
Austria?? Yes it was a powerful nation in Europe at one time, BUT it is a German CULTURE. We have Germany. Too many people are looking at the name of the civ and thinking of the country. They don't call the America civ the United States of America civ. Focus away from countries and keeping it on the culture.
Now for my thoughts on what should be added:
1) Vikings, like everyone else. They had expansionist abilities (being the first Europeans to discover the Americas)
2) Mongols, like everyone else. Couple of reasons: they changed warfare with the use of horses (raids then pulls out quickly), they forced the Chinese to build the Great Wall to keep them out and they also produced a "Great Leader" in history, Genghis Khan.
3) Incas. We need something in South American and they were a great culture. They were highly advanced in Math and Sciences, especially Astronomy (as were the Mayans who were on the Yucatan Penisula in Mexico) and they had cities that were dated back as far as 12,000 years ago (carbon-14 dating) leaving them one of the oldest civs in history. Ditto on a lot of things that I said about the Aztecs above.
4) Spain. It was a powerhouse in Europe at one time and most of central and South America speaks its language. Not to mention they were "officially" the first Europeans to discover the Americas and get credit for it. See more about this in #1.
5) Carthaginians. Did everyone forget about Hannibal already?
6) Ottoman Empires (Turkish culture). A significant empire in that region for a time. Enough that it fills the gap between Europe and the Middle East. And at least most people say they have heard of it.
7) Amazons - this is my debatable one, but south america needs some civs. with the incas this would make 2 on the continent. that is my only logical reason and it breaks all my rules about which civs should be in. Either this or Brazil, what choices we have.
8) Thai or cultures from the "Indochina" area. SE Asia. Thailand, Vietnam, etc.
9) Byzantine Empire. Here's one that many may have forgotten.
10) Australia or Aborigenes: something needs to be on that continent. I would suggest the latter because of the "original culture" of the land. Don't ask me about great leaders or cities or anything else about these people.
It looks like I need to throw some more change into the kitty. I think I ran over my 4 cents worth. AND please don't start taking offense because your country couldn't make the list or your culture doesn't seem to fit my rules of who should become a civ. It's just a game (and my opinion).