What three eras have characterized the field of criminology over the past 100 years?

The three eras that have characterized the field of criminology over the past 100 years are:

1. The early era focused on the study of criminal behavior and its causes, known as the "Classical School" of criminology.
2. The mid-20th century saw the rise of sociological theories emphasizing societal influences, such as strain theory and social disorganization theory.
3. In more recent times, there has been a shift towards more interdisciplinary approaches, incorporating psychology, Biology, and other fields in understanding crime and criminal behavior.