Is there evidence of benevolent alien encounters/races?

Was very curious about this subject, as I remember reading something about this subject on this very same subreddit not to long ago.

And by benevolent, I mean like possibly wanting to help humans in some way, or possibly letting us develop without any outside interference? (i.e. not killing us after we advance to a certain level of tech)

Sorry if this seems a bit jumbled, just wanted to ask this one quick question.

Submitted January 29, 2017 at 09:57AM by Teknotokon_II http://ift.tt/2kgrxiQ