Final answer:
Classical Criminology declined due to the emergence of new theories, criticism of harsh punishment, and changes in social and political landscapes.
Step-by-step explanation:
Classical Criminology declined due to a variety of factors. One reason for the decline was the emergence of new theories and approaches in the field of criminology, such as biological, psychological, and sociological perspectives, which challenged the classical paradigm. Another factor was the criticism of the harsh punishment and deterrence-focused approach advocated by classical criminologists. Additionally, changes in social and political landscapes, such as the rise of reform movements and the recognition of the importance of social factors in crime, also contributed to the decline of Classical Criminology.