In broad terms, African-American literature can be defined as writings by people of African descent living in the United States. It is highly varied. African-American literature has generally focused on the role of African Americans within the larger American society and what it means to be an American. As Princeton University professor Albert J. Raboteau has said, all African-American study "speaks to the deeper meaning of the African-American presence in this nation. This presence has always been a test case of the nation's claims to freedom, democracy, equality, the inclusiveness of all." African-American literature explores the issues of freedom and equality long denied to Blacks in the United States, along with further themes such as African-American culture, racism, religion, slavery, a sense of home, segregation, migration, feminism, and more. African-American literature presents experience from an African-American point of view. In the early Republic, African-American literature represented a way for free blacks to negotiate their identity in an individualized republic. They often tried to exercise their political and social autonomy in the face of resistance from the white public. Thus, an early theme of African-American literature was, like other American writings, what it meant to be a citizen in post-Revolutionary America.