Crab mentality, also known as crab theory, crabs in a bucket mentality, or the crab-bucket effect, is a way of thinking best described by the phrase "if I can't have it, neither can you". The metaphor is derived from anecdotal claims about the behavior of

crabs Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...

when they are trapped in a bucket: while any one crab can easily start to climb out, it will nonetheless be pulled back in by the others, ensuring the group's collective demise. The analogous theory in human behavior is that members of a group will attempt to reduce the

self-confidence Confidence is a state of being clear-headed either that a hypothesis or prediction is correct or that a chosen course of action is the best or most effective. Confidence comes from a Latin word 'fidere' which means "to trust"; therefore, having ...

of any member who achieves success beyond the others, out of

envy Envy is an emotion which occurs when a person lacks another's quality, skill, achievement, or possession and either desires it or wishes that the other lacked it. Aristotle defined envy as pain at the sight of another's good fortune, stirred b ...

jealousy Jealousy generally refers to the thoughts or feelings of insecurity, fear, and concern over a relative lack of possessions or safety. Jealousy can consist of one or more emotions such as anger, resentment, inadequacy, helplessness or disgust. ...

resentment Resentment (also called ranklement or bitterness) is a complex, multilayered emotion that has been described as a mixture of disappointment, disgust and anger. Other psychologists consider it a mood or as a secondary emotion (including cogniti ...

, spite,

conspiracy A conspiracy, also known as a plot, is a secret plan or agreement between persons (called conspirers or conspirators) for an unlawful or harmful purpose, such as murder or treason, especially with political motivation, while keeping their agree ...

, or

competitive Competition is a rivalry where two or more parties strive for a common goal which cannot be shared: where one's gain is the other's loss (an example of which is a zero-sum game). Competition can arise between entities such as organisms, indivi ...

feelings, to halt their progress. The same claims about behaviour are embodied in the phrase

tall poppy syndrome The tall poppy syndrome is a cultural phenomenon in which people hold back, criticise or sabotage those who have or are believed to have achieved notable success in one or more aspects of life, particularly intellectual or cultural wealth; "cut ...

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