By the twenty-first century criminologists looked to a wide range of factors to explain why a person would commit crimes. There are certain factors in our societies, cultures (family values), system (educational, political, law-enforcement...), economy, and so on that endorse the potential of criminal activities of an individual. Usually a combination of these factors is behind a person who commits a crime.
Reasons for committing a crime include greed, anger, jealously, revenge, or pride. Some people decide to commit a crime and carefully plan everything in advance to increase gain and decrease risk. These people are making choices about their behavior; some even consider a life of crime better than a regular job—believing crime brings in greater rewards, admiration, and excitement—at least until they are caught. Others get an adrenaline rush when successfully carrying out a dangerous crime. Others commit crimes on impulse, out of rage or fear.