In 1590, al-Mansur took advantage of the recent civil strife in the empire and sent an army under the command of Judar Pasha to conquer the Songhai and to gain control of the Trans-Saharan trade routes. After the disastrous defeat at the Battle of Tondibi (1591), the Songhai Empire collapsed.
One way that a few firms can gain some control over their market is by secretly cooperating with one another to agree on certain things that wouldn't be obvious to the normal eye.
The west had more population I believe...
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The mathematicians of ancient Greece made a hugely significant contribution to world thought and all practical subjects which depend on that intellectual basis, from geometry to engineering, astronomy to design. Influenced initially by the Egyptians, Greek mathematicians would push on to make breakthroughs such as Pythagoras' theory of right-angled triangles.
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