If we become an interstellar civilization which will happen?

Depending on the circumstances, all of the above.

If warp drive becomes as readily available as on Star Trek or Star Wars, there will be crooked corporations that will wipe out the smaller civilizations like to Conquistadors did to the Mayans and other Mexican civilizations.

But there will be organizations who believe in mutual respect and mutual gain where they want to give peace a chance.

Anthropology will still exist, but then there are also those floating the bill that doesn't see the expense is worth.... using a cold fusion device to save a primitive people from an unstable volcano. From Star Trek Into Darkness.

And it will reach that point if we find a planet with the right elements and contains, but needs to be terraformed so we can live there... like Mars.

Number 5 is the path to becoming an interstellar civilization. If we do not develop faster than light travel then the long time required to make an interstellar voyage means that the rewards of such travel would never be enough to justify the investment and therefore we would never develop interstellar travel. But if we colonize our solar system in large space habitats such as O'Neill Cylinders, Bernal Spheres and Stanford Torus's which we would do for the return from developing the resources of our solar system, we would in fact have interstellar generation ships by default and groups of them would drift further and further into space.

As to encountering another civilization, our experience of encountering more primitive civilizations on Earth are more issues of cultural contamination, despite the most noble of intent of some people, the T-shirts and baseball caps would leak out, the McDonald's would be built and Coca-Cola will be sold. The primitive culture will never be the same again, it would become an ethnic subgroup barely holding on to their traditions and culture.

In fact, it depends on what kind of people play role there. If there go scientists (they must go at first) and stay there for long then there'll be a lot of studies but without extinction or massive killing of them.

But now come to the point, we know world or universe will run by the orders of politicians. So, there'll go businessman too. And a big business may cause great extinction unless people of the world become more civilised then.

The fastest synthetic merchandise, Voyager a million took over 30 years to holiday .002 gentle years. the nearest superstar is 4.5 gentle years away, so a journey there would take 75,000 years. Stars are spread at an standard distance of 5 gentle years aside in our Galaxy, that is one hundred,000 gentle years for the time of. There are 2 hundred billion stars contained in the galaxy and tens of billions of galaxies contained in the observable Universe. no individual is putting forward interstellar holiday isn't plausible, only that the speed of sunshine is. regrettably, both bypass hand in hand. regardless of if we carried out velocities close to the speed of sunshine, even it is rather slow given the size of the Universe. at contemporary, with the suitable technologies we've, if we positioned all our attempt in route of it, lets deliver a probe to the nearest superstar in 0.5 a century at suitable utilising nuclear pulse propulsion or image voltaic sails. do not get thoroughly discouraged regardless of the undeniable fact that. bear in mind, the potential small breakthroughs we've in the present day have massive purposes contained in the destiny. Scientists have already proven a thanks to regulate the habit of one atom various meters away by manipulating an similar atom, which demonstrates swifter than gentle communique. This has huge purposes contained in the arriving centuries. In our lifetime, we can see area marketplace take its toddler steps. regardless of if we theoretically arise with options for swifter than gentle holiday/communique in our existence time (and we can), functional software and the massive engineering suitable complications linked will take centuries to handle. there is for sure the limitations of our fragile organic and organic bodies. in the intervening time, our first toddler step is spreading into the picture voltaic gadget and taking income of the components that asteroids and celestial bodies have. after we've performed that, we've a platform to construct upon for interstellar holiday. imagine of it this way. even as the first individual smelted metal ore, he cleared the direction for immediately's skyscrapers.

As someone with a B.A. in Anthropology (Subfield Archaelogy), I studied the New World. I HOPE we don't have a repeat of Columbus.

It could be any of the above, depending on whether we find other civilizations.

1.. we will find a good reason to make them look like they are hostile.. then we will wipe them out, thinking we are doing the right thing..

we will wipe ourselves out