The butterfly effect describes a phenomenon in chaos theory whereby a minor change in circumstances can cause a large change in outcome. List of best movies incorporates this concept.
A Sound of Thunder
X-Men: Days of Future Past
Back to the Future
The Butterfly Effect
The 2009 film Mr. Nobody incorporates the butterfly effect and the concept of smaller events that result in larger changes altering a person's life
A gambler who trusted no one. A woman who risked everything. And a passion that brought them together in the most dangerous city in the world.