So extremism side in terms of politics is easy to Identify... If someone has a set of ideologies where anything that is even slightly different, introducing nuance, is "the enemy" then you are dealing with someone on the extreme end.
If you are on the left and see centrists as evil as the right, and even the moderate left as evil, then you are probably an extremist.
Basically you just need to look at how well defined the walls of the silo is.
So yea extremism is easy to identify... now right vs left I think that is harder because you can be right and left in different categories its not an all or nothing thing.
For example communists, socialists.anarchists, progressives. are all generally agreed to as "left" though having quite a bit of ideological difference. Generally I'd say the common denominator of the left vs right is the left focuses on ensuring individuals power is mitigated (to some extent) and that the power and resources need to be spread out and not allow the natural processes of of concentration of power in a small group of individuals.
Therefore common themes among the left are redistreibution of power and wealth and/or the prevention of centralized power (as is the case of anarchism, which even sees the government as bad).
the right on the other hand seems to see a strong centralized power as ok, so long as it comes about through natural power-dynamics. Generally prefering free-markets and seeing accumlated power in a central place as both natural and good.
@toiletpaper @admitsWrongIfProven
I dont think that was much of a change at all. The spectrum remained the same, free-market proponents are certainly more left than dictators or monarchs.. it was true then as it is true now to say, from the perspective of a dictator free-market supporters are left of them.