The US doesn't have a unitary form of government because the point of democracy is that the people have the power. If the US became a unitary government, than it would really become like a dictator government, and the people wouldn't be able to express their opinions via votes if the government is "ultimately supreme", and that all other administrations listen only to the central government
The “Great Frost” of 1740 was one of the coldest winters of the eighteenth century and impacted many coun- tries all over Europe. The years 1740–1741 have long been known as a period of general crisis caused by harvest failures, high prices for staple foods, and excess mortality.
