ok, so now I'm done with socionics discussion and am moving on to metasocionics: the analysis of socionics in terms of socionic concepts. For example, as seen through Ni, each element has become more well-developed (more differentiated, more general in scope) in not just individuals, but in humanity as a whole over the course of history.
Ti: Mathematics is Ti in its purest form. Because of Godel's incompleteness theorem, we now know that certain problems cannot be answered by logical analysis. The boundary between metamathematics and mathematics is less clear than it once was. Computer programming allows mathematical structures to be directly realized. As for the practical sphere, new forms of government have arisen: democracy creates order directly from chaos. The creation of the EU proves that international organization is possible, beneficial, and perhaps inevitable.
Te: Modern industrialism started in the Industrial Revolution, but since then means of production have become ridiculously efficient. Supermarkets, drug stores, and assembly lines. You can buy almost everything you need over the internet without ever leaving your house. The internet makes library research a thing of the past.
Se: We now have near-total control over the entire planet, and are preparing to expand to the rest of the solar system. We have little to nothing to fear from nature. Any threats that exist--such as asteroid collision--we are working on.
Si: Environmentalism (including the Gaia hypothesis) is a recent invention. More importantly, biology (and specifically bioengineering) will create dramatic changes to how we ensure our health. In connection with the developments in Se, even natural disasters, famine, and drought now have only local effects on the human race, and do not affect its overall balance. Modern medicine (and especially modern sanitation, which was unknown just a few centuries ago) has eradicated many major diseases.
Ne: The internet allows anybody to learn anything they want about anything, and to discuss it like we're doing here. The rise of the layman, but also ultraspecialization in academia (partly Te).
Ni: Books, and later video games and virtual reality let us create artificial worlds that were previously just the products of our imagination. People now realize that existentialism and nihilism capture an essential part of reality. Sci-fi and futurism.
Fe: Television increases the impact and audience of oratory a bazillionfold. Movies, music, TV, and other media provide new ways of getting through to people. Speech-writing, stand-up comedy become a profession.
Fi: We are rethinking the outdated institution of marriage, which is already taken much less seriously than the feelings and the bond it is supposed to represent. Pets are a way of creating a kind of small relationship that is impossible in a primitive society. Online dating lets us meet people we would otherwise never have the chance to meet. The media inundates us with stories about celebrity relationships. Homosexuality is no longer taboo (though this is more a culture-specific thing). People have much more choice in general about what relationships they want to have.