Gasoline or petrol is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines. When formulated as a fuel for engines, gasoline is chemically composed of organic compounds derived from the fractional distillation of petroleum and later chemically enhanced with gasoline additives. It is a high-volume profitable product produced in crude oil refineries.
Aggression is a behavior aimed at opposing or attacking something or someone. Though often done with the intent to cause harm, it can be channeled into creative and practical outlets for some. It may occur either reactively or without provocation. In humans, aggression can be caused by various triggers. For example, built-up frustration due to blocked goals or perceived disrespect. Human aggression can be classified into direct and indirect aggression; while the former is characterized by physical or verbal behavior intended to cause harm to someone, the latter is characterized by behavior intended to harm the social relations of an individual or group.
In criminology, the broken windows theory states that visible signs of crime, antisocial behavior and civil disorder create an urban environment that encourages further crime and disorder, including serious crimes. The theory suggests that policing methods that target minor crimes, such as vandalism, loitering, public drinking and fare evasion, help to create an atmosphere of order and lawfulness.
Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula Pb(C2H5)4. It was widely used as a fuel additive for much of the 20th century, first being mixed with gasoline beginning in the 1920s. This "leaded gasoline" had an increased octane rating that allowed engine compression to be raised substantially and in turn increased vehicle performance and fuel economy. TEL was first synthesised by German chemist Carl Jacob Löwig in 1853. American chemical engineer Thomas Midgley Jr., who was working for the U.S. corporation General Motors, was the first to discover its effectiveness as an antiknock agent in 1921, after spending several years attempting to find an additive that was both highly effective and inexpensive.
Antisocial personality disorder, often abbreviated to ASPD, is a mental disorder defined by a chronic pattern of behavior that disregards the rights and well-being of others. People with ASPD often exhibit behavior that conflicts with social norms, leading to issues with interpersonal relationships, employment, and legal matters. The condition generally manifests in childhood or early adolescence, with a high rate of associated conduct problems and a tendency for symptoms to peak in late adolescence and early adulthood.
Lead poisoning, also known as plumbism and saturnism, is a type of metal poisoning caused by lead in the body. Symptoms may include abdominal pain, constipation, headaches, irritability, memory problems, infertility, and tingling in the hands and feet. It causes almost 10% of intellectual disability of otherwise unknown cause and can result in behavioral problems. Some of the effects are permanent. In severe cases, anemia, seizures, coma, or death may occur.
A theory regarding the effect of legalized abortion on crime is a controversial hypothesis about the reduction in crime in the decades following the legalization of abortion. Proponents argue that the availability of abortion resulted in fewer births of children at the highest risk of committing crime. The earliest research suggesting such an effect was a 1966 study in Sweden. In 2001, Steven Levitt of the University of Chicago and John Donohue of Yale University, citing their research and earlier studies, argued that children who are unwanted or whose parents cannot support them are likelier to become criminals. This idea was further popularized by its inclusion in the book Freakonomics, which Levitt co-wrote.
In the United States, the relationship between race and crime has been a topic of public controversy and scholarly debate for more than a century. Crime rates vary significantly between racial groups; however, academic research indicates that the over-representation of some racial minorities in the criminal justice system can in part be explained by socioeconomic factors, such as poverty, exposure to poor neighborhoods, poor access to public and early education, and exposure to harmful chemicals and pollution. Racial housing segregation has also been linked to racial disparities in crime rates, as black Americans have historically and to the present been prevented from moving into prosperous low-crime areas through actions of the government and private actors. Various explanations within criminology have been proposed for racial disparities in crime rates, including conflict theory, strain theory, general strain theory, social disorganization theory, macrostructural opportunity theory, social control theory, and subcultural theory.
Sex differences in crime are differences between men and women as the perpetrators or victims of crime. Such studies may belong to fields such as criminology, sociobiology, or feminist studies. Despite the difficulty of interpreting them, crime statistics may provide a way to investigate such a relationship from a gender differences perspective. An observable difference in crime rates between men and women might be due to social and cultural factors, crimes going unreported, or to biological factors. The nature or motive of the crime itself may also require consideration as a factor. Gendered profiling might affect the reported crime rates.
Deterrence in relation to criminal offending is the idea or theory that the threat of punishment will deter people from committing crime and reduce the probability and/or level of offending in society. It is one of five objectives that punishment is thought to achieve; the other four objectives are denunciation, incapacitation, retribution and rehabilitation.
Crime has been recorded in the United States since its founding and has fluctuated significantly over time. Most available data underestimate crime before the 1930s, giving the false impression that crime was low in the early 1900s and had a sharp rise after. Instead, violent crime during the colonial period was likely three times higher than the highest modern rates in the data we have, and crime had been on the decline since colonial times. Within the better data for crime reporting and recording available starting in the 1930s, crime reached its broad, bulging modern peak between the 1970s and early 1990s. After 1992, crime rates have generally trended downwards each year, with the exceptions of a slight increase in property crimes in 2001 and increases in violent crimes in 2005–2006, 2014–2016 and 2020–2021. As of July 1, 2024 violent crime was down and homicides were on pace to drop to 2015 levels by the end of the year.
Psychopathy, or psychopathic personality, is a personality construct characterized by impaired empathy and remorse, in combination with traits of boldness, disinhibition, and egocentrism. These traits are often masked by superficial charm and immunity to stress, which create an outward appearance of apparent normalcy.
Rick Nevin is an economic consultant who acts as an adviser to the National Center for Healthy Housing and has worked on the Federal Strategy to eliminate childhood lead poisoning. Amongst other research, he has published papers in the journal Environmental Research claiming to demonstrate a link between environmental lead exposure and violent crime in the United States and in nine countries worldwide. This research has been publicized in the press by a Washington Post article in July 2007, by Mother Jones in 2013, and elsewhere, including the UK's Independent in October 2007 and Guardian in 2013. Nevin's work on lead pollution has also featured in numerous books about public health, social sciences and social justice, criminology, environmentalism and sustainability, and air pollution.
Psychoanalytic criminology is a method of studying crime and criminal behaviour that draws from Freudian psychoanalysis. This school of thought examines personality and the psyche for motive in crime. Other areas of interest are the fear of crime and the act of punishment.
The correlates of crime explore the associations of specific non-criminal factors with specific crimes.
Since their inception in the 1970s, video games have often been criticized by some for violent content. Politicians, parents, and other activists have claimed that violence in video games can be tied to violent behavior, particularly in children, and have sought ways to regulate the sale of video games. Studies have shown no connection between video games and violent behavior. The American Psychological Association states that while there is a well-established link between violent video games and aggressive behaviors, attributing acts of violence to violent video gaming "is not scientifically sound."
The use of cannabis as a recreational drug has been outlawed in many countries for several decades. As a result of long-fought legalization efforts, several countries such as Uruguay and Canada, as well as several states in the US, have legalized the production, sale, possession, and recreational and/or medical usage of cannabis. The broad legalization of cannabis in this fashion can have numerous effects on the economy and society in which it is legalized.
The crime drop or crime decline is a pattern observed in many countries whereby rates of many types of crime declined by 50% or more beginning in the mid to late 1980s and early 1990s.
The superpredator or super-predator is a type of criminal in a now-debunked criminological theory that became popular in the 1990s in the United States, which posited that a small but significant and increasing population of impulsive youth were willing to commit violent crimes without remorse. Criminologist and political scientist John J. DiIulio Jr., theorized that superpredators were a growing phenomenon and predicted a large increase in youth crime and violence as a result. The idea of superpredators contributed to a moral panic about juvenile crime. Proponents warned of "a blood bath of violence" or "Lord of the Flies on a massive scale". American lawmakers seized on this idea, and implemented tough-on-crime legislation for juvenile offenders across the country, including life without parole sentences.
The evolutionary neuroandrogenic (ENA) theory is a conceptual framework which seeks to explain trends in violent and criminal behavior from an evolutionary and biological perspective. It was first proposed by the sociologist Lee Ellis in 2005 in his paper "A Theory Explaining Biological Correlates of Criminality" published in the European Journal of Criminology. Since then, it has expanded into an interdisciplinary field that intersects biology, psychology, and sociology. The theory rests on two propositions. The first is that in human mating behavior, females prefer males that appear to be more competent providers of resources, and so males exhibit increased competitive behavior than females to obtain access to those resources. The second is that biological mechanisms lead to differential development in the male brain which then mediates the increased competitive behaviors that cause criminality. Though it was originally intended to explain high rates of criminality in young men, it has since been used as a framework to explain gang behavior, terrorism, and the rise of the criminal justice system.
