They: benefited from the gold and salt trade, were influenced strongly by trade. (dense vegetation, not desert, prevented the Islamic conquest of sub-Saharan africa)
Well, one part of it is that if a country knows you're not going to attack them, they're more likely to trade with you and help you out during a war. Also, many countries end up in alliances because they are all working towards the same cause, like defeating a particular country. So sometimes it's like an "the enemy of my enemy is my friend" kind of thing. Some times alliances are formed for protection, particularly by a young country or a smaller country. The best example I can give of this is from during and after the American Revolution, where the soon-to-be-United States of America formed an alliance with France so they both could take a jab at England. Hope this helps!
Answer:
to fight against racial discremination and prejudice in order to create equality and equal oppurtunites for African Americans in America
Explanation:
The traditional model of the politicial spectrum defines political opinions based on change.