Silly Humans. This is why we have signed treaties to remain unknown to your population. Too many of you still refuse to believe we are real and revealing ourselves (which we have done many times in the past) would cause more damage to your societies at this time. You showed much promise through the past hundreds of thousands of years. If it weren't for the matter of disastrous events that kept sending your species back into dark ages, some natural and some by your own hands, you would all be sharing space travel with us now. As you raise yourself out of this last dark age period, you are showing much promise again and we hope to meet you in galactic travels in the near future. Assuming, all goes well.