Thhe name of the weapon is the Greeks Fire
Answer: "This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land"
This is the clause that limits state legislation from going against the constitution.
At the end of the quotation, when the author says “Island” he refers to England. This excerpt refers to the fact that the English people took a great amount of land as its colonies between the 16th and 18th centuries. The British Empire and its Colonial Department was settled in England, which is and Island.
And the author states that it is absurd that a quite smaller island would govern a continent as big as Africa.