How do the main/book titles of the novel contributions to its meaning?

The very title of the novel, Native Son, invites the reader to think about ideas of "nativism" and "territory." From the opening scene of the novel, where Bigger is killing the rat-invader, to Bigger's execution at the novel's end, there is a tension between Bigger's "native" status and his lack of political rights. Bigger was born in Mississippi, not Chicago, and the idea of a "native son" applies more to Bigger's status as an American as opposed to his status as a Chicagoan. Indeed, for all of the squalor of the Black Belt, Wright continually presses the argument that Bigger would be no better off in Mississippi or in Harlem. As America's "native son," Bigger is born an American, but perhaps more important, the Bigger that he becomes, is a product of America's native soil.