Was the Soviet invasion of Afghanistan one of the major reasons that led to the fall of Soviet Union?
That is what the world history teacher told me.
Please show your sources.
The Review Article, Antony Kalashnikov (2012) "Differing Interpretations: Causes of the Collapse of the Soviet Union" Constellations:
"there is a correlation between mediums of writing and the "factor of collapse" they tend to espouse."
"that the historiography is best classified by "factors for collapse", and that these are: economic, nationalities, political, and systemic. It is interesting to note that while most studies (textbooks being the notable exception) tend to opt for one factor as being most important in bringing about collapse, they don't argue it vis-à-vis others. On the contrary, they do not engage other standpoints,"
Afghanistan is mentioned once in this review article, and only as part of the "briefing" of the context of the time.
Therefore—no substantive historiography of the collapse of the Soviet Union ascribes Afghanistan as a cause.
Therefore—Afghanistan was not one of the major reasons that led to the fall of Soviet Union.