Why did so many americans come to fear communism and other radicals after the end of ww1

The date a source was created is considered part of its historical context intended audience purpose point of view

How did modern american history begin with “contact”?

Which of these innovations led to increased production in american factories in the early 1800s? a. the use of interchangeable parts b. the construction of canals c. the invention of the mechanical reaper d. the availability of electricity