Describe about the Crime Theroy

To understand criminal justice, it is necessary to understand crime.  Most policy-making in criminal justice is based on criminological theory, whether the people making those policies know it or not.  In fact, most of the failed policies  in criminal justice are due to misinterpretation, partial implementation, or ignorance of criminological theory.  Much time and money could be saved if only policymakers had a thorough understanding of criminological theory.  At one time, criminological theory was rather pure and abstract, with few practical implications, but that is not the case anymore.

There are basically thirteen (13) identifiable types of criminological theory, only three (3) of which are considered "mainstream" criminology (strain, learning, control).  The oldest theory (biochemistry) goes back to 1876 and the last four theories (left realism, peacemaking, feminist, postmodern) have only developed in the past twenty-five years.  The following table illustrates, with more information about each theory below the table:

Theory	Causes	Policy
1. Biochemistry	heredity, vitamin deficiency, allergy, tumor, toxins, brain dysfunction, hormonal imbalance	isolation, treatment
2. Psychology	low intelligence, psychopathy, stress	treatment, counseling
3. Ecology	disorganized neighborhoods	community empowerment
4. Strain	economic goal blockage	increased opportunities
5. Learning	imitation, reinforcement schedules	more effective negative reinforcement, more use of positive reinforcement
6. Control	socialization, low self-control	child-rearing, social bonds
7. Labeling	shunning, identity immersion	nonintervention, reintegration
8. Conflict	power differentials, competition	increased equality
9. Radical	class struggle, capitalism	praxis, socialism
10. Left Realism	predatory relationships	more effective police protection
11. Peacemaking	inner suffering and turmoil	spiritual rejuvenation
12. Feminist	gender inequity, patriarchy	end sex discrimination
13. Postmodern	hierarchical privileges and language	more informal social control

1. Biochemistry is known by many names: biological, constitutional, genetic, and anthropological criminology.  The oldest field is criminal anthropology, founded by the father of modern criminology, Cesare Lombroso, in 1876.  He was one of the first exponents of the positivist approach to explaining crime.  Historically, theories of the biochemistry type have tried to establish the biological inferiority of criminals, but modern bio criminology simply says that heredity and body organ dysfunctions produce a predisposition toward crime.
2. Psychological criminology has been around since 1914, and attempts to explain the consistent finding that there is an eight-point IQ difference between criminals and noncriminal.  That gap isn't enough to notice, but it might make them more impulsive and foolhardy, and even smart people with high IQs are vulnerable to folly.  Other psych criminologists focus on personality disorders, like the psychopaths, sociopaths, and antisocial personalities. 
3. Ecological criminology was the first sociological criminology, developed during the 1920s at the Department of Sociology at the University of Chicago.  Hence, it is also called Chicago School sociology.  Ecology is the study of relationships between an organism and its environment, and this type of theory explains crime by the disorganized eco-areas where people live rather than by the kind of people who live there.  
4. Strain, sometimes called by the French word anomie, is a 1938 American version of French sociology, invented by the father of modern sociology, Emile Durkheim (1858-1917).  This type of theory sees crime as the normal result of an "American dream" in which people set their aspirations (for wealth, education, occupation, any status symbol) too high, and inevitably discover strain, or goal blockages, along the way.  The only two things to do are reduce aspirations or increase opportunities.
5. Learning theories tend to follow the lead of Edwin Sutherland's theory of differential association, developed in 1947, although ideas about imitation or modeling go back to 1890.  Often oversimplified as "peer group" theories, learning is much more than that, and involves the analysis of what is positively and negatively rewarding (reinforcing) for individuals.
6. Control theories in criminology are all about social control.  Only those called containment or low-self-control theories have to do with individual psychology.  Control theory has pretty much dominated the criminological landscape since 1969.  It focuses upon a person's relationships to their agents of socialization, such as parents, teachers, preachers, coaches, scout leaders, or police officers.  It studies how effective bonding with such authority figures translates into bonding with society, hence keeping people out of trouble with the law.
7. Labeling theory was a child of the 1960s and 1970s which saw criminals as underdogs who initially did something out of the ordinary, and then got swept up in a huge, government-sponsored labeling or shunning reaction.  It argues that anyone facing such an overwhelming, negative labeling social reaction will eventually become more like the label because that is the only way out for their identify formation.  It points out that sometimes it’s best to do nothing (for minor offending), and that there are few re integrative rituals designed to help people fit back into their communities.
8. Conflict theory holds that society is based on conflict between competing interest groups; for example, rich against poor, management against labor, whites against minorities, men against women, adults against children, etc.  These kind of dog-eat-dog theories also have their origins in the 1960s and 1970s, and are characterized by the study of power and powerlessness.   
9.  Radical theories, also from the 1960s and 1970s, typically involve Marxist (referring to Karl Marx 1818-1883) critiques of capitalist society which allows things to exist like millions of billionaires and millionaires while the vast majority of people live in poverty or just get by.  Such fundamental economic disparities reflect basic contradictions in the way work is organized into demoralizing, brutalizing, and oppressive conditions.  Crime is seen as a reflection of class struggle, a kind of primitive rebellion with criminals behaving as rebels without a clue. Only through praxis (informed action based on theoretical understanding) will the new socialist society be formed and crime will go away. 
10. Left realism is a mid-1980s British development that focuses upon the reasons why people of the working class prey upon one another, that is, victimize other poor people of their own race and kind.  It wants the police to have more power in protecting poor people, but on the other hand, doesn't want the police to be invasive or intrusive.  
11. Peacemaking criminology came about during the 1990s as the study of how "wars" on crime only make matters worse.  It suggests that the solution to crime is to create more caring, mutually dependent communities and strive for inner rebirth or spiritual rejuvenation (inner peace).  
12. Feminist criminology matured in the 1990s, although feminist ideas have been around for decades.  The central concept is patriarchy, or male domination, as the main cause of crime.  Feminists also tend to call for more attention to female points of view.
13. Postmodern criminology matured in the 1990s, although postmodernism itself (as a rejection of scientific rationality to the pursuit of knowledge) was born in the late 1960s.  It tends to focus upon how stereotypical words, thoughts, and conceptions limit our understanding, and how crime develops from feelings of being disconnected and dehumanized.  It advocates replacing our current legal system with informal social controls such as group and neighborhood tribunals.