How can nationalism lead to war?

The supreme court ruled that slaves could not sue because they could not read. they could not become lawyers. they lived in southern states. they were not considered citizens.

Which of the following episodes led to widespread charges that president reagan was not in adequate control? a. the u.s. retreat from lebanon after the bombing deaths of 241 u.s. marines as they lay sleeping in their barracks near beirut b. the trading of arms for hostages and the illegal funding of a right-wing insurgency in the iran-contra affair c. the sale of millions of acres of public lands to private corporations by the department of interior d. the proposal to congress, year after year, of federal budgets with huge deficits that ultimately ended up tripling the national debt

Congress could only request money and had no power to tax; each state made its own money; there was no national court system. which one of these weaknesses do you believe was the most important to correct?