When did Afghanistan join the group of 193 sovereign states that is the world's largest intergovernmental organization?
Afghanistan and the United Nations: Afghanistan officially joined the United Nations on 19 November 1946 as the Kingdom of Afghanistan. Member states of the United Nations: The United Nations member states are the 193 sovereign states that are members of the United Nations (UN) and have equal representation in the UN General Assembly. Member states of the United Nations:  The UN is the world's largest intergovernmental organization, ahead of the Organisation of Islamic Cooperation.
19 November 1946