All of these factors are forces that threaten the current democratic government of afghanistan except

the presence of al-qaida

local powerbrokers

taliban sympathizers

invasion by the soviet union

Invasion of the Soviet Union... seeing how the U.S.S.R. is gone, and has been for years...

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years