"The following month, Germany sunk four more U.S. merchant ships. ... On April 6, 1917, the United States entered World War I. Get a firsthand look at how a new breed of weapons like WMDs, submarines, armored tanks and air attacks changed modern warfare forever in WWI: The First Modern War"
Answer:
I believe that that the answer is yes.
Explanation:
The United States needed Middle Eastern oil and Middle Eastern nations needed Western capital and technology. This mutually beneficial but dependent relationship would forge strong alliances but also be the cause of harsh conflicts.
An economic downturn.
http://factsanddetails.com/russia/History/sub9_1f/entry-4990.html
The Soviet Union turned a rural, agrarian society into one of the largest economic powerhouses in the world. The breakup greatly effected it.
New imperialism was focused on trade, land acquisition, and conversion (faith, language, etc.) of the african subcontinent
Overestimate one’s capabilities, to be overly confident is harmful
