Do you think there are aliens?

[Kadagar_AV]

The argument that technologically advanced alien lifeforms would be good because otherwise they'd have destroyed themselves seems very weak to me, as shown by what technologically advanced humans have done to not so technologically advanced humans in the past...

well, only a couple of hundred years ago, a drop in the ocean concerning universal time, we thought it natural to enslave others among our species and to kill off animals bordering to extinction.

Today, all over the world, slavery is frowned upon to say the least, and wild life preservations are all over the place, much funded by the average citizen. We are not born to be good, but generation by generation we are getting closer. Evolve that over some million years...

EDIT: I used these 2 examples as they mimic aliens stumbling upon us, or us stumbling upon aliens. If WE did, do you think we would send nukes, or try to make contact and learn from them?