Why do we need other JVM languages

Question

I see here that there are a load of languages aside from Java that run on the JVM. I\'m a bit confused about the whole concept of other languages running in the JVM. So:

Answer 1

Because the JSR process is rendering Java more and more dead: http://www.infoq.com/news/2009/01/java7-updated

It's a shame that even essential and long known additions like Closures are not added just because the members cannot agree on an implementation.