How many principles are in the challenges of government

The Framers of the Constitution knew exactly what kind of government they didn't want. They didn't want the British monarchy, a system of government that centralized so much power in the hands of one man (the King) and one institution (the Parliament) that tyranny became (in the Americans' thinking, at least) the inevitable result. But they also didn't want the Articles of Confederation, the system of government that the newly independent American states had cobbled together in 1781. That system had decentralized power so completely that the feeble national government wasn't able to do much of anything at all. As increasingly serious social and economic problems threatened the young United States over the course of the 1780s, many of America's leading statesmen came to believe that a complete overhaul of the government was needed.

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regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.