Cultivation Theory proposes that heavy television viewers come to see the real world in ways that reflect the most common and recurrent messages of the television world. It suggests that the more time people spend watching television, the more likely they are to believe social realities portrayed on television reflect the actual world. The theory was developed by George Gerbner and focuses on how television shapes viewers' perceptions of violence and crime in society. Later refinements added the concepts of "mainstreaming" and "resonance" to better explain television's influence on viewers' beliefs. While influential, Cultivation Theory has also received criticisms for being an oversimplification and not accounting for other social and media influences.