Steel cables. It was interesting how they did it, but it is still standing after 136 years!
I hope this helps! :)
Slavery developed in southern colonies due to large populations of native americans died due to the diseases the colonists brought over and then the indentured servants from england did not have the skill set necessary for cropping/harvesting tobacco but they realized people from africa were used to the labor intensive work and were able to work long hours in the sun which led to the spread of slavery through triangular trade.
Answer:
The idea of collective security failed to keep the peace between 1920 and 1935 due to the fact that the league was unable to act against the larger powers due to its lack of support, and the depression.
Explanation:
They cited the failure of the United States of America to join the League from the start and the rise of the Soviet Union outside the League as one of the major reasons why the League failed as instrument for the development and enforcement of collective security.