Who werethe major innovators of the late nineteenth century and early twentieth century. has to be 4 people

During the 19th century the united states government reacted to the union attempts to organize labor by

In the united states, the government creates laws and regulations that business activities to prevent wrongdoing.

Which foreign policy initiative countered the spread of soviet influence by restricting the spread of communism? a. roosevelt corollary b. truman doctrine c. nullification proclamation d. good neighbor policy