UIUC Approach for Facilitating Social Change in Modern Society Questions

I’m stuck on a Sociology question and need an explanation.

Although this course has attended to various social problems in our society, Liberalism has
become a popular approach for facilitating social change in modern society. However, like every approach,
liberalism has its limits. Explain some of these limitations of the liberal, reformist approach. What is abolition?
What makes abolition a better or worse approach than reformism for social change?