Does aliens exist? - Serious debate

You must be careful then in defining "intelligent life" because as long as I'm concerned monkeys are pretty smart since they can use tools and also form societies. I though of intelligent life in a interstellar/intergalactical sense, so yes, I wouldn't consider humans to be a intelligent at all, since we hold more power of self-destruction than power to colonize other planets. In a sense, we're still animals looking for our own survival. But leaving human instinct aside, defining "intelligent life" it's a complicated subject, only defining "life" it's already a tough challenge (virus being the most clear example, since they need a host to perform "living being activities"). Those ideas were the ones I resume as "curving space time" and the biggest problem with all of them is the amount of energy required to achieve those things. You would need a loot of founding as well and if we're talking about humans that's pretty hard to achieve. As Einsteins said when he was asked why they were able to develop atomic bombs but not atomic energy yet, "politics is harder than physics". Despite science answering questions and thinking in new ways to achieve greatness, that's just a tool and such tool can be used to do something useful or to benefit a few people, some "elite". Approximately 1% of the global population controls 50% of the global wealth - http://policy-practice.oxfam.org.uk... - . Also 15 billion years isn't a lot of time if you consider universal scales, life has been around for 4.5 billion years, so that's why I said our universe was pretty young yet. Also in order to get to "intelligent life" you need a at least multi-cellular life and some believe there's a great barrier between uni and multi-cellular life since it took about 2.5 billion years to get from one to the other. About the "exponencial advance of our technology", I believe you are referring to Moore's law, yet that kind of technology has a huge barrier that we're going to hit pretty soon, the quantum realm. In the quantum realm things becomes counter-intuitive and noone truly understands what's going on in such a micro-scales in the way we can understand classical mechanics. We may have the math to describe such phenomena, but we have no deeper understanding of it. I contemplate the posibility of aliens being different to us, and in order for them to cooperate I mention they should """evolve from a ant-like species""", which are one of the most cooperative species. But that consideration would add a factor which makes your statistical analysis about the probability of intelligent life able to interstellar travel even smaller. Considering most of the species choose a non-comperative survival strategy would greatly reduce the probability of the developing of such species. I don't think humans are near to become one big cooperative species, as I stated before 1% of the global population holds for 50% of the global wealth, religious extremist responsable for terrorist attacks on other countries, the greatest countries being the ones who are quite the nationalism type. An even more obvious example is the fact that usually people don't trust to stranger, that's because most of people only look for their benefit or their benefit and a few people who surround them (family, friends). Science advance faster than society, those must go toghether in order to succed as species.