There is no doubt about the effectiveness of meditation. It is a tool. And certainly Vipassana seems to be as methodical and systematic an approach as can be possible, when it comes to learning(and seeing results of) meditation. However, as in programming, it is important to go beyond the tool/s. And the same is true about this peace thing. There is a similar path (non-dual advaita based on self inquiry), where in addition to meditation, emphasis is given on the root of the problem(or identifying and fixing the root of the problem, which they identify as "I" or mind). In fact, it is very similar to Zen Budhism, in the sense it is very direct, but is geared more more towards knowledge-based /intellectual bend of mind. Here is one interview by Daivd Goodman on this: http://www.davidgodman.org/rteach/jd5.shtml. I am sure there must be lot of internet resources on the same.
