The income tax is a much less effective tool for reducing inequalities than has often been thought. James Mirrlees
The properties of executability and universality associated with programming languages can be combined, in a single language, with the well-known properties of mathematical notation which make it such an effective tool of thought. Kenneth E. Iverson
The Endangered Species Act is the strongest and most effective tool we have to repair the environmental harm that is causing a species to decline. Norm Dicks
Fear is, I believe, a most effective tool in destroying the soul of an individual - and the soul of a people. Anwar Sadat
What we in industry learned in dealing with people is that people do not work just for money and that if you are trying to motivate, money is not the most effective tool. Akio Morita
Violence is useless. Civil disobedience is a necessary and effective tool to get the job done. Reza Pahlavi