What are the limitations on using primary sources?

How did nationalism aid napoleon’s rise to power in france? his new continental system expanded trade with britain, making the french proud of their prosperity and his rule. his extension of the french revolution’s social reforms promoted france’s cultural image and his power. his military victories greatly activated french national pride and won him continuing popular approval. his support of women’s rights in the napoleonic code made french women proud of their nation and its leader.

Which quotation from the declare ration of independence shows the idea of the social contract

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?