if you start to read about all the ufo events which happend, are happening then you realize this is a redundant question.
I think we should make humanity strong, wise, and able to defend are place amoung the stars and become one great nation based on great morality vision and those principles which raise in the heart when you look at images of far away galaxys.
When I was younger I used to think about this subject, about other life, but really thats not the question, the issue is how bad we are, how bad things... how it should be and how it is are two totatlly different things, for instance if you invent some thing wounderfull but you only can or will make 1p but some thing is already in place which does the same thing but is crap, dangerious, kills people, or even not very affective, but it makes 1000p profit which thing will be sold.
the product which cost more and makes it easy to profit and control.
There is a difference between being 18 and thinking about aliens and being 34 and knowing how the world really works.
If an alien landed and said I am here in peace and to help you, what would happen is he would be arrested and cut into peices after some time.
When I was 3-4-5 years old I used to go to bed with a ET doll close to me, but most people turn into those guys that would run after ET in the film with the Keys on their waist.
We sux.... but there are always children with new hearts :-)
bye