Mali was influenced by other parts of the world by trade.
One source of
"Frictional unemployment".
Frictional unemployment<span> is the
joblessness that outcomes from time spent between employments when a laborer is
hunting down, or changing starting with one occupation then onto the next. It
is also called search unemployment and can be founded on the conditions of the
person. Frictional unemployment<span> is the
main type of joblessness that won't be decreased through money related
development. </span></span>
I believe it was the ability to share information on who to trust- in other words, gossip. There was probably a multitude of things that set them apart, though, so Imight be incorrect.