How did Captain of Industry or Robber Barons use monopoly to wipe out competition?

Which factor has played the most important role in changing the way history is studied over time?

Why were americans concerned about the future of north and south america? check all of the boxes that apply. they worried that european countries would take over independent countries in latin america. they thought that european nations could threaten democracy in the united states. they believed that europe would never again return to the americas.

Explain why the greeks might not have had a great influence on the world if they had better farmland?