Answer:
There are many ways and many levels of how people influence nations.
Use of Social Media is the most common these days. A lot of people do believe everything they are told and see on Social Media. Media and entertainment industry is another powerful tool of influencing societies. A lot of movies and TV series are funded by people who believe a script matches an ideology that could be helpful in influencing the watchers.
Another way to influence which is one of the oldest is through history. History is always written by the powerful. Imagine having a good ruler who lost everything, while defending their people, trying to tell their story and getting people to write it (ofcourse in this case the good ruler was left alive).
Moreover, what you studied at school (or what everyone studied) has a major influence on your brain and the ability to perceive situations. People who have studied text books of a certain curriculum think and behave differently from others who have studied some other curriculum.
Music, especially the lyrics also have a great potential to influence large masses.
Last but not the least and this one affects more than a single nation or a society - the concept of God and Religion. The best tool to influence and mass control people has always been religion.
Explanation: PLEASE GIVE BRAINLY.
