Tell me, how will your taste in fashion make a foreign leader abdicate? Does everyone hear about that one tv series and decide they had enough of their government? Will those mixed families go up in arms purely because they can trace much of their lineage to the neighboring country? How will you claim victory over all governments just because everyone looks the same? Do all interests in power end with entertainment? As you approach the end of the game you have a multitude of victory options. Maybe you've been focusing on science, war, influence, or a strong combination of it all, but in the end you have the option to take advantage of all you've working on to step up and claim legitimate victory over all nations. A societal model isn't all there is to government.