The quote just saying that he feel like he belong to the human race itself more strongly than any culture/nationality.
d. He told Coronado to be slow and cautious about approaching the Natives.
Federalism, or the dual roles of state and national government, is part of the system of sharing power in government. Within the system of separate powers, however, the framers of the Constitution provided for "national" or "federal" supremacy. This meant that the national government was supreme in regards to many issues in relation to state governments, as enumerated by the Constitution.
If Otto Esche’s idea to use Bactrian Camels to transport salt would have worked out, there would have been a mad rush to the British Columbia, Canada area. The economy for the province would have more than likely boomed, creating a wealthy area. Salt was a very expensive, yet useful commodity as it was used to preserve meats and cure leather. This made it invaluable during this time period. It could also help to sustain soldiers during war (circa Civil War).