What is the central idea of the text? Underground Railroad (commonlit)

Freedom

Explanation:

Underground Railroad was a secret network of abolitionists during the early to mid-19th century who helped African Americans escape from enslavement in the American South to free Northern states.The Underground Railroad was not only dangerous, but also illegal and their activities resulted in freedom for many men, women, and children which also helped undermine the institution of slavery.

The central idea of the text is FREEDOM.