Here's a short story:

Propaganda is information that is not objective and is used primarily to influence an audience and further an agenda, often by presenting facts selectively to encourage a particular synthesis or perception, or using loaded language to produce an emotional rather than a rational response to the information that is presented. Propaganda is often associated with material prepared by governments, but activist groups, companies and the media can also produce propaganda. 

In the twentieth century, the term propaganda has been associated with a manipulative approach, but propaganda historically was a neutral descriptive term. A wide range of materials and media are used for conveying propaganda messages, which changed as new technologies were invented, including paintings, cartoons, posters, pamphlets, films, radio shows, TV shows, and websites. 

In a 1929 literary debate with Edward Bernays, Everett Dean Martin argues that, “Propaganda is making puppets of us. We are moved by hidden strings which the propagandist manipulates.” 

"Propaganda" is a modern Latin word, the gerundive form of "propagare", meaning "to spread" or "to propagate", thus "propaganda" means "that which is to be propagated". Originally this word derived from a new administrative body of the Catholic church (congregation) created in 1622, called the "Congregatio de Propaganda Fide" ("Congregation for Propagating the Faith"), or informally simply "Propaganda". Its activity was aimed at "propagating" the Catholic faith in non-Catholic countries. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What is this article about?
Guess: Propaganda

Question: What does the word literally mean?
Guess: to spread

Question: When was the word coined?
Guess: 1622

Question: Referring to what?
Guess: that which is to be propagated

Question: Which religion created the word?
Guess: Catholic

Question: Is propaganda objective?
Guess: no

Question: Is it recently considered to be manipulative?
Guess: yes

Question: How about in the past?
Guess: no

Question: Who generally makes propaganda?
Guess: governments

Question: What other organizations make it sometimes?
Guess: activist groups

Question: What did Everett Dean Martin say propaganda does?
Guess: making puppets of us

Question: When did he say that?
Guess: 1929

Question: Who was he debating with?
Guess: Edward Bernays

Now answer the following question in the same format.

Question: Has propaganda's materials changed over time?

yes