12 Years a Slave / 12 years of slavery (2013, Steve McQueen) Steve McQueen's "12 Years a Slave" portrays almost perfectly the brutal reality of the economic and political system that governs the United States of America.
As far as we know, at least. Among other unfortunates, Solomon Northup, an African-American who had a family and a respected job in the state of New York, was kidnapped, sold as a slave, and enslaved on a plantation for 12 years.
2. Gravity (2013, Alfonso Cuarón) In contrast to science fiction, "Gravity" is more of a space thriller. In Earth's orbit, astronaut Ryan Stone (Sandra Bullock) is alone in space with destroyed space stations and dead crew members around her and must somehow return to Earth.
Even though 80 of the 91 minutes of the film were made with CGI, Alfonso Cuarón has not explained how he accomplished it. Since the technology to make this rollercoaster ride was not available, he spent several years developing it in post-production before starting filming.
(2018, Alfonso Cuarón) "Roma" was written, directed, produced, shot, and edited by Alfonso Cuarón, which gives us an indication even without watching it that this is a personal work. He was inspired to undertake these projects by personal passion, as with "Gravity", but this is more than just a personal passion.
In other words, this is a film about him alone. 'Colonia Roma' refers to the neighborhood where he grew up in Mexico City. Families with well-to-do citizens live there in high fence-enclosed houses with servants taking care of their needs.
4. Moonlight (2016, Barry Jenkins) Robert Downey Jr. tells Ben Stiller in "Tropical Thunder" that if he wants to win an Oscar, he should "Never go full retard" Tom Hanks and Dustin Hoffman both portrayed characters who were slow and autistic, but not completely retarded.
The entire film "Moonlight" revolves around that scene. There are no retards in this story, but the main character is repeatedly and completely socially disadvantaged. Drug dealers grow up as gay African-American men.
5. Avengers: Infinity War (2018, Anthony Russo, Joe Russo) Before "Infinity War", Marvel had been building a world that, for a time at least, will disappear with 18 feature-length films. Such a grandiose stage would not have allowed the cosmic battle between good and evil to unfold any other way.
It was necessary to build each superhero's microworld, their backstories, their abilities, and their place in the grand scheme of things. It will take dozens of superheroes and their helpers to oppose Thanos and his hordes, but they will fail spectacularly and half of them, along with the rest of the universe, will be wiped out.