To put a halt to what it considered to be a rising tide of concentration in American business, Congress, with full power to do so, decided to clamp down with vigor on mergers … on the premise that mergers do tend to accelerate concentration in an industry. Many believe that this assumption of Congress is wrong, and that the disappearance of small businesses with a correlative concentration of business in the hands of a few is bound to occur whether mergers are prohibited or not. But it is not for the courts to review the policy decision of Congress…