There is a capital difference between all the other civilizations mentioned, even if Greeks were heavily influenced by them and adopted many of their advancements and scientifical discoveries or art, technology and so far.
In the 1920s, the danger of buying stock on credit was that if the stock dropped, borrowers have to make up the difference.
When the stock dropped, basically the borrowers losing an amount of value of his assets. But since he bought the stock before the price was dropped, he had to make up the difference
The answer is Uganda because they have an autocratic government, and citizens under an autocratic government have little participation with the government.
hopefully my answer helps you