Filibuster Reform in the Senate, 1913-17
This chapter explains the adoption of the Senate's first cloture rule in 1917, specifically why the Senate adopted a supermajority (2/3) rule and why this event occurred in 1917.
Gregory Koger. "Filibuster Reform in the Senate, 1913-17" Process, Party and Policy Making: Further New Perspectives on the History of Congress. Ed. David Brady and Mat McCubbins. Palo Alto: Stanford University Press, 2007. 205-225.
Available at: http://works.bepress.com/gregorykoger/12