The dramatic rise in the membership of the UN during late 1991 and early 1992 is best accounted for by the
admission of a large number of newly independent African states.
appointment of the first African as Secretary- General.
break-up of the Soviet Union into independent Republics.
expansion of the membership of the Security Council.
Step-by-Step Explanation
The break-up of the Soviet Union in 1991 led to the emergence of multiple independent republics, many of which sought membership in international organizations like the United Nations. This significant geopolitical shift resulted in a dramatic increase in UN membership as these newly independent states aimed to establish their presence on the global stage. Consequently, the UN expanded to include these nations, reflecting the changing dynamics of international relations.