How can a small rocket be applied to benefit humanity instead of using it for bombardment.

Mail. If the post office goes out, we'll just send personal rockets from one place to another. :)

It is.used for the.betterment of humanity an old saying is"if you want peace,prepare for war" or "peace through superior firepower". However if that doesnt suit you I suppose it could be retasked to do high altitude weather research.

@ThatNerdyChick: good idea, but is it practical? How are you going to get it to deliver the mails with precision? Is delivery of mails worth the money you will use to build a rocket and launch it?