This excerpt provides justification for what action! The ruling of Worcester v. Georgia.
The extension of slavery into western territories.
The rejection of the theory of nullification.
The enactment of the Indian Removal Act.

Why does c. wright mills identify critical thinking as one of the most important criteria for the development of intellectual craftsmanship? why is constantly being aware of the biased nature of your reactions and interactions (what c. wright mills calls self-reflexive) key to the development of that critical thinking? finally, why is keeping a file important, how can it lean to intellectual curiosity which can foster critical thinking and to develop a keen analytical mind?