Final answer:
Heterogeneity and immigration, increased drug abuse and availability of weapons, modernization and urbanization, and overpopulation and homelessness are factors that lead to increases in crime.
Step-by-step explanation:
According to cross-cultural researchers since the 1980s, factors that lead to increases in crime include heterogeneity and immigration, increased drug abuse and availability of weapons, modernization and urbanization, and overpopulation and homelessness.
Heterogeneity and immigration can result in a lack of social control and collective efficacy in neighborhoods, making it more difficult to prevent crime. Increased drug abuse and the easy availability of weapons contribute to higher crime rates. Modernization and urbanization can create social disorganization in communities, leading to elevated crime levels.
Overpopulation and homelessness can also contribute to higher crime rates due to increased social unrest and the need for individuals to resort to illegal activities to meet their basic needs.