This document discusses theories of crime causation and criminal subcultures. It defines a theory as an educated guess or hypothesis about how something works, even if not proven. It lists five examples of crimes (theft, burglary, cyberbullying, kidnapping, child abuse) and possible reasons for them beyond just poverty, such as jealousy, carelessness, seeking attention online, wanting money or ransom, and family stress or abuse. Finally, it says we need to study crime causes to understand how crimes happen and how to prevent them. Criminal subcultures are groups that share values and norms that support criminal behavior, but they vary in how much and what types of crimes they support.