even and trend

Choose and research any event in each era. Analyze any trend inspired by the event. Trends can be in any industry, social, cultural, political, economic, philosophical, art, design, music, etc.
Use any class concept to justify the trend’s expression. (The reasons why it came into existence.)
However, you must use any 4 concepts + Spiral vs Pendulum for a total of 5 class concepts to use in the entire Midterm. No repeats.
While you can research the events, answers are based on your own supported conclusions. NO CUTTING and PASTING of Googled “answers.”
Provide only a brief summary of the event itself, focus on its connection to the trend and how the class concept applies and explains expression of the trend.
Eras:

1910-1920
1940-1950
1960-1970
1990-2000
2000-2010
For example:

2010-2020

Event: Presidential 2016 Election

Trend: 4th wave of feminism

Class concept which accounts for the trend: Spiral vs. pendulum

Write a solid paragraph how this concept explains the expression of this trend.

Note: When using spiral vs pendulum you must address how the conditions (cultural shifts) of this trend are different than previous iterations and why.

[only paragraph ]