What is the main idea of “black America and the class divide”

It was a bitter cold saturday morning ,the young track star dressed for his daily five mile run

What is the central idea in this advice from branch rickey to jackie robinson?  

Read the passage from a vindication of the rights of woman. that the society is formed in the wisest manner, whose constitution is founded on the nature of man, strikes, in the abstract, every thinking being so forcibly, that it looks like presumption to endeavour to bring forward proofs; though proof must be brought, or the strong hold of prescription will never be forced by reason; yet to urge prescription as an argument to justify the depriving men (or women) of their natural rights, is one of the absurd sophisms which daily insult common sense. does wollstonecraft maintain an objective tone in the passage? yes, because she uses objective language such as “society is formed in the wisest manner.” yes, because she uses objective language such as “it looks like presumption to endeavor.” no, because she uses subjective language such as “though proof must be brought, or the strong hold.” no, because she uses subjective language such as “absurd sophisms which daily insult common sense.”