Gender role, which refers to the cultural expectations as understood by gender classification, is not the same thing as gender identity, which refers to the internal sense of one's own gender, whether or not it aligns with
Definition of butterfly effect : a property of chaotic systems (such as the atmosphere) by which small changes in initial conditions can lead to large-scale and unpredictable variation in the future state of the system
This article is about the film. For the chaos theory example, see Butterfly effect. For other uses, see Butterfly effect (disambiguation). The Butterfly Effect is a 2004 American psychological thriller film written and directed by Eric Bress and J. Mackye Gruber, starring Ashton Kutcher and Amy Smart.