On what basis did the Supreme Court rule that the Constitution protected students’ right to wear black armbands as a sign of protest?

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?

The baltic sea has been called a scandinavian mediterranean explain why that comparison seems logical

What country gained its independence from france shortly after the french revolution as a result of a slave rebellion