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Five decades ago , the United Nations set up an elaborate Middle East anti-drug monitoring unit and asked that the region 's countries set up police states , criminal penalties and other infrastructure to squash the drug trade . To get around this cultural prohibition , the project 's fieldworkers set up homogeneous discussion groups consisting of women , men and youth . Global Link 's employees set the prices at which persons willing to trade could buy and sell currency contracts , accepted orders placed by the account executives based on what purported to be real-time market information , and purported to execute them by taking the opposite side of the orders . In the same way that a school 's leaders set the tone for their school 's teaching culture , teachers set the tone for their classroom 's learning culture .