— Why Do We Want a Linear Collider? –

As everybody in this audience knows, there are (at least) two important and exciting progress in particle physics in recent years. The first one is of course ∗Invited plenary talk given at 3rd International Workshop on Physics and Experiments with e+e− Linear Colliders, 8-12 Sep 1995 , Iwate, Japan †This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contract DE-AC03-76SF00098 and in part by the National Science Foundation under grant PHY-90-21139.