True, since they carefully copied throughout the centuries.
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Answer: Islam
Explanation:
The old Kingdom of Ghana and the Malian and Songhai empires were all located around the same area at different points in time, the Western part of Africa including Mali and the rest of the Western Sahel.
These Empires became very wealthy from the trade of gold and spice such as salt with Arabian traders and this led to alot of interactions with the latter.
As the Arabs settled and traded with these Empires, they spread the message of The Prophet and Islam spread. Indeed, it was because of the foothold that Islam gained in this kingdom that enabled it to then spread to the rest of Africa.
By invoking the act, the United States could abstain from participating directly in a foreign conflict.
Advantages:
From a conservative or state-based ideology: it is much easier to control population since they rarely receive "strange" ideas or influence from outside. Domestic policies become much more important. In so, it becomes easier to set popular aims targeting citizens.
The country could(historically seen) stand the best defense against outside powers which could try to set an invasion. For example, the Great Wall of China turned out to set a strong defense against Mongols and other menaces along many centuries.
Disadvantages are listed:
Trading with other countries can influence negatively on economic growth, as there is no autonomous country even if it results as big as China.
Trade has become key in today's globalized world, henceforth the need to collaborate or cooperate in economic exchanges is a necessity to keep up the pace in global affairs.
Ida B. Wells was a firm believer that many of the tactics used by whites against blacks, such as violent intimidation and lynching, was used purely to keep the black population from advancing socially and economically, and therefore advocated heavily for black and women suffrage in the hopes of eventually being able to change the laws.