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'Erin Brockovich' (2000) -

Julia Roberts starred in the 2000 movie 'Erin Brockovich,' which tells the real-life story of an average but exceptional woman who goes after big business. Single mother Erin Brockovich becomes a legal assistant and discovers a huge cover-up.

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'Erin Brockovich' (2000) - Brockovich finds that the Pacific Gas & Electric Company of California have been covering up their contamination of a local water source, which is causing serious illnesses in the community. It's an inspiring story, and Julia Roberts gives a career-defining performance.

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'Enemy of the State' (1998) -

'Enemy of the State' is a conspiracy movie with an all-star cast. Will Smith stars as an unsuspecting lawyer who is framed for the murder of a congressman.

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'Enemy of the State' (1998) -

He frantically follows the spiderweb to the heart of the conspiracy in order to clear his name. The movie also features Regina King, Jon Voight, and Gene Hackman.

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'The Matrix' (1999) -

'The Matrix' might seem like a surprise entry on the list, but at the heart of this cult classic is the story of a computer programmer trying to fight a major conspiracy.

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'The Matrix' (1999) -

Neo discovers that his entire reality has been constructed by powerful computers, and he wages war on the system to regain control.

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'The Constant Gardener' (2005) -

This Oscar-winning movie starring Ralph Fiennes and Rachel Weisz is based on the acclaimed book by John le Carré. When his wife is murdered in Kenya, Justin Quayle uncovers a massive conspiracy while trying to find out why she was killed.

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'The Da Vinci Code' (2006) -

This 2006 movie starring Tom Hanks is another film based on a best-selling novel. 'The Da Vinci Code' follows a symbologist on a mission to understand his friend's murder, which takes him down a mysterious path involving a 2,000-year-old secret society and a quest for an ancient religious artifact.

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'Angels & Demons' (2009) -

'Angels & Demons' is based on the second book in the popular series by Dan Brown. This time it gets a little closer to home, with Tom Hanks' character in a race against time, and the Illuminati!

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'Angels & Demons' (2009) -

The existence of the Illuminati is one of the most hotly debated conspiracy theories in the world. In 'Angels & Demons,' they are orchestrating a deadly plot against Vatican City.

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'The Interpreter' (2005) -

'The Interpreter' stars Nicole Kidman as a UN interpreter who claims to overhear an assassination plot. A Homeland Security officer, played by Sean Penn, is assigned to her to discover if she's telling the truth.

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'The Manchurian Candidate' (2004) -

'The Manchurian Candidate' (2004) stars Denzel Washington as a decorated soldier who returns home from the Gulf War. Underneath his story of heroism is a sinister mystery involving brainwashing and murder.

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'The Manchurian Candidate' (1962) -

The 1962 original directed by John Frankenheimer’s is also a fantastic watch. It's a masterful depiction of Cold War paranoia. It stars Frank Sinatra and Angela Lansbury, so that's an extra bonus!

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'The Bourne Trilogy' (2002-2007) -

'The Bourne Trilogy' starring Matt Damon is a great place to start when it comes to conspiracy movies. Damon's character Jason Bourne wakes up with amnesia and tries to put together the pieces of his past life as a CIA agent.

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'The Bourne Trilogy' (2002-2007) -

Bourne struggles to uncover his true identity and find out what he did in the past, at the risk of uncovering a dangerous CIA conspiracy.

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'The X-Files' (1998) -

The 1998 movie based on the hit TV show follows FBI agents Scully and Mulder, played by Gillian Anderson and David Duchovny. They are sent to investigate a bombing, and discover that criminal evidence has been destroyed.

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'The X-Files' (1998) -

In typical 'X-Files' fashion, things get supernatural. They discover that the US government is attempting to cover up the fact that aliens are colonizing Earth.

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'JFK' (1991) -

Needless to say, this one is based on a true story. The 1991 movie 'JFK' explores the mysterious assassination of John F. Kennedy, an historical event that initiated even more conspiracy theories than the Moon landing or 9/11.

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'The Firm' (1993) -

John Grisham certainly knows how to spin a suspenseful mystery, and the 1993 adaption of his book 'The Firm' is a thrilling watch. Tom Cruise stars as a recently qualified lawyer who lands a great case defending a large company, but he begins to uncover a much darker story.

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'The Conversation' (1974) -

'The Conversation' is one of Francis Ford Coppola’s greatest creations. It's a wonderful ode to the growing panic people were feeling in the '70s over increased surveillance and dissipating privacy. It was released during the era of the Watergate scandal.

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'The Conversation' (1974) -

Gene Hackman plays a surveillance expert who is hired to listen in on a couple, but when he hears them discuss their fear of being murdered, he begins to wonder about the people who hired him. He descends into paranoia and obsession.

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'Three Days of the Condor' (1975) -

'Three Days of the Condor' (1975) is another film that reflected the anxiety and paranoia of that period in history. Robert Redford plays a CIA researcher who is charged with outwitting the entire intelligence organization when his colleagues all turn up dead.

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'The Insider' (1999) -

'The Insider' tells a true, but little-known story about the whistleblower who uncovered a sinister conspiracy by big tobacco companies in the US.

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'The Insider' (1999) -

A journalist named Lowell Bergman, played by Al Pacino, discovers that certain tobacco companies have been secretly and purposefully making cigarettes more addictive, and more dangerous.

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'Nixon' (1995) -

This 1995 movie directed by Oliver Stone stars Anthony Hopkins as the notorious Richard Nixon. Hopkins gives an exceptional performance as the US president who was famous for his use of intimidation and dodgy dealings.

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'Marathon Man' (1976) -

Dustin Hoffman stars in 'Marathon Man,' another classic '70s conspiracy thriller! Hoffman plays a PhD student who works on the case of a Nazi war criminal who turns out to be in hiding.

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'Marathon Man' (1976) -

He discovers that a secret government agency is protecting the Nazi, played by Laurence Olivier, and he gets caught up in a dark and twisted conspiracy. Be warned: there's an infamous scene where Hoffman is tortured in a dentist's chair!

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'The Negotiator' (1998) -

Samuel L. Jackson plays a respected police negotiator in the 1998 movie 'The Negotiator.' When his reputation is ruined by false allegations of corruption, he takes extreme action to clear his name.

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'The Negotiator' (1998) -

He takes a group of people hostage to buy time while he searches for the truth about who is trying to set him up. Kevin Spacey plays the negotiator sent in to deal with him.

Sources: (The Atlantic) (Glamour) (What Culture) 

See also: The craziest royal conspiracy theories

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