That’s the question asked and answered by New Scientist. It’s an important question to ask, not only because we may contaminate potentially important ecosystems on the planets in our own solar system, but we could have a negative impact on any life, microbial or otherwise, that we might find in our long journey to discover other Earths out in the cosmos. But worrying about potentially harming alien organisms isn’t nearly enough. In fact, it falls short of the mark. While we should definitely be concerned about bringing bacteria and the like to other planets (presumably by accident), we also need to consider what is the biggest Earth-based life form that aliens need protecting from: us. That’s right, Homo Sapiens sapiens. The most dominant species on the planet Earth and also one of the most destructive. Known for high intelligence, advanced technology, and a propensity for complex social structure involving religion, cultural hierarchy, and a variety of other social things (we specially have a lot of good mythology). There is certainly a lot of concern about human involvement in the NS article, however it gives you the simplistic, immediate version of it. Microbial infections would be directly due to human involvement and there is good reason to be concerned that such an infection could have drastic, if not deadly (on the apocalyptic scale) effects on an alien ecosystem. But there is more to this question than how we can accidentally hurt extraterrestrial life. What about humans themselves? Humans are dangerous. Let’s face it. Curiosity is our downfall. We design powerful weapons that can devastate an entire planet if we become stupid enough to use them. Likewise, we have the desire for knowledge and constantly push the fold as we attempt to find new ways to deal with what frightens us most as a species: death. By far the most disturbing aspect of humanity is how humans treat fellow humans, and even how humans treat animals. The greatest concern, then, for space travel and meeting new lifeforms is how humanity will choose to deal with alien beings. Historically we have not been at all kind to our fellow human beings. Just in recent history I can think of African slavery, the Civil Rights Movement, the slaughterings in Darfur, the Civil War, the Japanese slaughters in China during WW2, the Holocaust, Stalin’s Purges, and countless cases of rape, torture, and abuse (against adults and children). Even when we’re not causing the death of the innocent, or even, to a certain extent, killing those who are not innocent in a manner that is unnecessary, there are plenty of instances where we are incapable of treating each other with at least a marginal level of equality. Discrimination is rampant, controlled by faulty, corrupt governments or supported by religious doctrine. Who can and cannot have something has in the past been determined by skin color or recently by sexual orientation. Being different is simply unacceptable in human society. And what about the animals? Animals have it worse than humans do, for the most part. Many of them are kept in cramped pens and slaughtered without the benefit of painless dead–often times they are slaughtered in a brutal way, without compassion or care that they too can feel pain and fear. Rats, mice, rabbits, other rodents, and even members of the Great Ape family, of which we are a part of, are subjected to medical testing, serving to provide us the apparatus needed to produce the appropriate medicines for what ails us as human beings (something of note to mention here is that much of this same research on the medical end has helped us to help animals as well, though the animals in question might not care about that at all). Zoos across the country frequently put animals in enclosures too small and inappropriate for a particular species. If that isn’t a concern, then the idea that animals are kept in cages for our entertainment, while systematically being destroyed by human encroachment on their habitat, or excessive human hunting, should be. What does this say about how we will treat alien lifeforms? Let’s be realistic about this, for lack of a more efficient way to see things. It is, in theory, inevitable that we will find alien life. Such life will probably have similarities to us in the same way that animals have similarities. Whether we find intelligent life is entirely up to speculation, but I do believe we will encounter conscious life, if not in my lifetime, then in the next two to three hundred years. That sounds like a long time, but we have to consider now, while we are still capable of seeing the future, what to do if and when we meet these alien creatures. People will be clambering to do medical testing, to string them up on the wall for examination, to stick them in cages for the amusement of the masses. Anyone who suggests this isn’t something we are capable of doing is blind to the reality of how we really are as human beings. But it doesn’t have to be this way. We don’t have to ignore what is a probability in the future by refusing to discuss the possibility. By the time human beings determined that we were treating animals wrongly it was already too late. We can’t bring that same fate to creatures of other worlds, especially if such creatures are not as technologically advanced as we are. In Star Trek they have a prime directive, a rule that attempts to govern the manner in which Federation ships deal with new civilizations and new intelligent species (and probably lesser-intelligent beings as well). As silly and ridiculous as such a thing might sound, we need a prime directive of our own. Barring disaster, we will be moving into the stars to seek out new planets, new homes to send our bloating population. We have an obligation as a race of beings who will be capable of interstellar
