[1] - https://trends.google.com/trends/explore?geo=US&q=%2Fm%2F065...
[1] - https://trends.google.com/trends/explore?geo=US&q=%2Fm%2F065...
Here is an alternate explanation: Very few people search for 19th century political philosphies on Google, compared to the number of people who search for "hangover". Therefore all it takes is 1 news article, interview, book, movie, etc to cause people to do a quick search and find out what a word means.
So called "using google as a dictionary" is all you are seeing here.
The spike you are seeing, no surprise, coincides with a specific person describing BLM as "marxist".
This has nothing to do with covid. It's honestly stupid for you to try to draw a straight line between COVID and marxism and imply that it's some kind of conspiracy that the Economist is hiding.
https://trends.google.com/trends/explore?geo=US&q=Cultural%2...