Armed conflicts between nations have always been and remain, unfortunately, a constant fact of life. How politicians and governments seek to avoid of these conflicts, however, varies greatly. Many leaders and political thinkers insist on the importance of demonstrating military might in order to reduce the likelihood of such conflicts. Others argue that flexing military muscle is basically inviting armed conflict, and that the best way nations can avoid conflicts is simply by keeping an open line of communication with one another. When forced to choose between a strong showing of military might and diplomatic efforts, which should nations choose in order to avoid armed conflicts?
 I agree with Perspective Three that the true impact of intelligent machines in our lives is that they challenge us to re-think our preconceived notions of what people can do or become in the future. A final example of this is brain-computer interfaces, or BCIs. Humans are able to manipulate computers with their brains via electrodes that are either implanted in their brains or attached (temporarily) to their heads. With these intelligent machines, formerly paralyzed people who had no hope of communicating with others are able to transcend their physical limitations by concentrating to form words out of keyboards on the computer screens. In addition, BCIs have captured the interest of people from all different backgrounds and are being applied to non-scientific fields like music to create new, previously unimagined instruments that react to people's thoughts, adding a new dimension to an ancient art form. Truly, intelligent machines are providing the impetus not just for greater efficiency, but for greater accomplishments.
Because so many students at the top universities have great ACT or SAT scores, I do recommend that students *consider* Subject Tests. You’ll only want to worry about them if you think that they can improve your testing portfolio. In the case of elite schools like Columbia, that means 750+ (or at least 700+). You can try tests from the Official Guide published by College Board. Fewer schools than ever are requiring the Subject Tests — especially with ACT scores. It would be a little challenging to fit them in (including preparing for them) as senior year starts and application season begins, so you may want to just sit tight with your ACT score.