Was there one great wall of china

Halle is a calculating, self-centered salesperson. she never engages in relationship marketing. she looks on any sales situation as a "win-lose" situation, and she believes any legal method she can use is justified when she wins. hallie is most likely at the stage of ethical development.

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?

What factors the economies of the muslim empires prosper?