It is considered the first decade of the modern era because it made a big change move from farming cultures toward capitalism, industrialization, secularization, rationalization, and the nation-state.
Hope I helped :)
They feared that a central government would become tyrannical
The Articles of Confederation did not create a strong central government. As a result, the federal government could not negotiate foreign treaties without agreement from the states, and contained no provision for federal courts. The national government under the Articles of Confederation was simply too weak as it also lacked taxation powers
Because they killed a bunch of innocent people.
Quite a vague title. Which war?