Ideology and science fiction

Last week I discussed about the genre conventions in Sci-Fi movies. this week I am discussing about how science fiction has historically depicted various ideological issues in across different generational times. There is a historical trend of how science fiction has depicted several social, political, economic, and other problems facing humanity and the world around us. Sci-fi movies or novels can be set to center around past, present, as well as the future.
For instance,  science fiction novels was written by H.G. Well's Time Machine which centered around class structure and the extreme form of Social Darwinism in United Kingdom - the idea that human beings have evolved into two social class system. Old ideological issues which have attracted movies and an other science fiction stories include, Utopian societies, and Dystopian societies.
In the modern times there are a host of ideological issue being showcase as sub-genres in science fiction movies and novels. A typical example is the Star war prequel trilogy, which showcase political issues such as corruption, exploitation, and decay - the good versus evil. Another ideological movie called The Minority Report features the current criminal justice system, introduces the idea of perfectly predicting a crime of violence so the offender can be arrested even before the crime is committed, and the political and legal ramifications of actually using such a system.
Finally, there is a sub-genre of science fiction stories, documentaries and movies that centered on climate change also called global warming. As this social issue has turned into hot political debate between the left and right and ideological lines, the media has given attention on the issue. Movies like Aluna, Merchants of Doubt, An Inconvenient, and The Day after tomorrow have showcased the global worming issue.

http://www.starwars.com/news/corruption-exploitation-and-decay-the-politics-of-star-wars