What barriers of Oppression does this book outline in part one? How does the author’s lived experience suggest the ownership of this oppression?

This is only a short answer space but I can make a general comment. The most obvious theme of the work is the racial divide that exists in America. Extending from early American history when blacks were enslaved to the present day in which black bodies are under constant surveillance and threat, white society has consistently denied the humanity of blacks in order to maintain its spurious "Dream." One of the main distinctions Coates makes is that racism gave birth to race, not the other way around. Race is a construct; it is something to which an absolutism is attributed but in reality is blurry. White people are not actually white but rather they think they are white because it gives them their power and privilege. Racism is thus so insidious because the people that think they are white also do not think they are racists. They claim disparities of wealth and education and treatment by the police are differences that just exist; they are more like natural forces than specific ideologies, laws, etc. Racism is primarily enforced through the plundering and subjugation of the black body.