Two events come to mind as providing some sort of precedent to the 2016 US election, the 1989 fall of the Berlin Wall and its impact on the Soviet Union and satellite countries, and events leading up to and following the French Revolution, 1789 to 1799. In both instances, pressures built up leading to a volcanic type explosion which became visible on the surface but where the causes lay underground.
The establishment media and almost all of the rest of us failed to appreciate what was happening in the US, because we were not looking at or listening to what half the population was saying. A few were, such as Bernie Sanders and Michael Moore. Sanders sits in the Senate as an independent and caucuses with the Democrats in the Senate. He raised a large amount of money in small donations with a crowd-sourcing type process. Moore is a documentary film maker who is skilled at covering topics ignored by the mainstream media.
The former Soviet Union
The 1989 demise of the Soviet Union has been followed by almost three decades of change for member countries which are now more or less independent. The transition has not always been smooth. Aside from foreign relations, what happened within each country was a change of the domestic political scene, generally towards democracy except in those places which are now part of Russia. It was a major upheaval as the countries of eastern Europe became more democratic.
America had a revolution in 1776, but this was a revolt against an external force, British control, and was not a result of dissatisfaction within the country as is the case today. Its success gave impetus to events in Europe.
The French Revolution
The French Revolution beginning in 1789 suggests parallels. It was an internal uprising by groups in French society which rebelled against their rulers and the prevailing economic and social conditions. It lasted for ten years and brought about change, but it also led to the rise and rule of Napoleon until his defeat in June 1815 at Waterloo.
The process was messy. On the positive side, it ushered in democracy to France – freedom of religion, legalization of divorce, decriminalization of same-sex relationships, civil rights for Jews and black people, plus the execution in 1793 of Louis XII.
A couple of short extracts on the French Revolution from Wikipedia suggest comparable circumstances to today’s US with of course different institutional factors in play.
Many other factors involved resentments and aspirations given focus by the rise of Enlightenment ideals. These included resentment of royal absolutism; resentment by peasants, labourers and the bourgeoisie towards the traditional seigneurial privileges possessed by the nobility; resentment of the Catholic Church’s influence over public policy and institutions; aspirations for freedom of religion; resentment of aristocratic bishops by the poorer rural clergy; aspirations for social, political and economic equality, and (especially as the Revolution progressed) republicanism.
Louis XVI ascended to the throne in the middle of a financial crisis in which the state was faced with a budget deficit and was nearing bankruptcy. This was due in part to France’s costly involvements in the Seven Year’s War and the American Revolution.
…the country’s extremely regressive tax system subjected the lower classes to a heavy burden, while numerous exemptions existed for the nobility and clergy. He argued that the country could not be taxed higher; that tax exemptions for the nobility and clergy must be reduced; and proposed that borrowing more money would solve the country’s fiscal shortages. Necker (finance minister) published a report to support this claim that underestimated the deficit by roughly 36 million livres…
So, parts of the world have been here before. How it will all play out, and throw in Brexit and upcoming elections in Europe, is a mystery to me. But there are similar circumstances to suggest parallels.