In George Orwell's 1984, the main theme throughout the novel is control, which is powered by the government. Although the book was published in the late 1940's, it is still of relevance in today's society.
If you have not read 1984 by George Orwell, it is centered on the life of a man named Winston Smith, who is a worker for one of the four ministries - the Ministry of Truth. Along with this ministry are the ministries of Love, Peace, and Plenty. Winston works as a records editor, and helps the government delete past or old documents by either editing the words or deleting the text altogether. The government in this world does not want documents that prove that their initial predictions about the future were false. In fact, the government goes as far as to monitor your every move in this futuristic world: watching through telescreens which you can't turn off, listening through microphones placed in public areas to confirm that no one is speaking against the government, and making sure that no one is planning to rebel against them.
It is extremely easy for one to be caught if they don't agree with the ways of the government, or in this case, "Big Brother." They even have Thought Police: a group of people who suppress ideas into one's mind if they are thinking negative thoughts about Big Brother. It is possible to catch someone by using undercover spies, overhearing people through microphones, or even listening to them talk in their sleep.
1984 is still relevant today because of the many conspiracies which state that in the near future, or possibly in the present, we are living under a totalitarian system of government. A topic that has flooded though social media is the question of whether or not people are watching us through our webcams - most remarks are a joke, but many believe it to be true. George Orwell predicted a way of life which could likely happen through his novel.
Orwell predicted that everyone would eventually need a "telescreen", as he called it. While they are not needed for government use, Orwell still had the right idea. The book, for the most part, was warning society not to let the government overrule - use your freedom to express your true feelings for security for the people and yourself.