The correct answer to this open question is the following.
We are talking about the film "Mr. Smith Goes to Washington," of 1939.
The three ways in which society and politics today are similar to that in 1939, as depicted in the film, are the following.
The plot of the film is about a newly elected Senator that arrives in Washington D.C. to work in Congress. Soon he realizes that he has to encounter corruption in US politics and decided to fight against these practices.
So the three ways in which society and politics today are similar to that in 1939, as depicted in the film, are political corruption, apathy in society to become more involved in politics, and mass media coverage of the news.
There is still corruption in different levels of the government. We just have to watch the news and read a little bit more to find more and more corrupt cases. But people seem not to be very interested in these issues and prefer to maintain their daily lives as if nothing happens until the moment these start to affect their lives. Mass media does not always expose the news as it should be. Sometimes, Media responds to the interest of their owners, who are allied to Congressmen or have political interests at hand.