Public feelings and propaganda were very important in changing how people thought about World War I. They played a big part in why the war started.

First, public sentiment was heavily shaped by nationalism, which means a strong pride in one’s country. In many countries, especially in Europe, people were told to see the war as more than just a political fight. They were encouraged to think of it as a necessary battle to protect their nation and its pride. As the war got closer, this strong nationalism changed public opinion, making the idea of going to war more acceptable. Many people thought fighting was a good thing that brought them together for a common cause.

Second, propaganda was widely used by governments to change how people felt. This included posters, movies, and more. Propaganda showed the enemy in a negative way, making them seem like a threat to everyone’s way of life. For example, British propaganda described Germany as the "Hun," suggesting they were cruel and barbaric. This helped rally people to support the war.

Also, economic factors connected with these feelings and propaganda. Governments encouraged people to support the war by buying war bonds and accepting rationing. This helped boost spirits and made people believe they were all contributing to their country’s cause.

In summary, the mix of strong public feelings rooted in nationalism and government propaganda created a situation where many people saw World War I as an unavoidable and just fight. This had a big impact on the reasons behind the war.