Classical theory has evolved into rational choice and deterrence theories: many criminals carefully calculate the costs and benefits of engaging in criminal activity.  People who are willing to break the law value the thrill and excitement, and are willing to take greater risks than other people – only if benefits outweigh risks.  Otherwise only an irrational person would continue to break the law.

Sociological Theories
1. Strain Theory (Emile Durkheim)people commit crimes when they believe they cannot achieve their desires and goals through legitimate means
2. Socialization Theorythe key influences leading to criminal behaviour are found in upbringing, peer groups, and role models
3. Social Conflict Theorythe root of crime is the unfair economic structures of capitalism
Contemporary Biological Theories
1. Biological Trait Theorycertain human traits, such as intelligence, personality and chemical and genetic make up, may predispose certain individuals to engage in criminal behaviour
2. Neurophysiologic Theoriesfocus on connection between neurological dysfunctions and criminal behaviour
3. OtherIt is also argued that poor diet, the influence of hormones, and exposure to drugs or alcohol in the womb can cause a person to become a criminal

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Was toltaly stuck until I read this, now back up and running.