Expanding into outer space is a great leap forward for humankind.
There is much we can learn about the Universe we live in by going out and exploring it and living in it.
There are also resources to mine and money to be made. With the Em Drive showing promise it may soon be feasible to go back and forth between Earth and Mars in a matter of months.
This new situation will necessitate a new treaty on how to deal with outer space. Currently nations claiming sovereignty over space or property being recognized in space is illegal under treaty. This will have to change. We can't have anarchy in outer space. But I do think that the part of the treaty banning nations should be kept as far as banning Earth nations from having sovereign control over space. New nations with their own laws and Constitutions should be formed. It's the only realistic solution anyways, since enforcing control over a place it takes months to travel to is just not realistic in the long-term and costs a ton of resources to maintain. Just ask the British of the late 1700s. As for private property that would have to be dealt with by these nations through their laws as well as treaties between themselves and with Earth nations.
As for myself if it ever becomes feasible to visit Mars and then return home to Earth I would love to go. I'd be even more eager to visit Europa, Io, Titan, or Enceladus.
If the purpose is only colonization or to prove human logistics to another planet I would say NO, that would be like the space race to the moon but at a much higher cost. But if the purpose is to find life, or if life has been found by the rovers and a laboratory is setup then yes, especially if this life can produce fuel, fight infections, etc. There are other benefits to understanding Mars here on Earth. For example , Olympus Mons, the tallest mountain on Mars helped our understanding of Hawaii. A planet has a maximum theoretical height for a mountain until it collapses under its own weight. The gravity of Mars is 3x less than Earth, Olympus Mons is 3x higher than Hawaii (from the ocean floor) Olympus Mons is collapsing under its own weight, there is a basal cliff surrounding the mountain, we can see this because its not under an ocean, this was discovered in the 70s when we had not yet thought to map the under ocean area of Hawaii, when we mapped it, we found the same structure surrounding the islands, Mars warned us that Hawaii is collapsing the same way which can result in Tsunamis that would effect the coastal areas of many continents.
This planet is too small, and we are heading that direction, anyway.
For the exponential growth in population we are experiencing, we will destroy this planet and our odds of survival will plummet. Colonizing Mars (or any planet) is the most intelligent course of action. It will increase our odds.
Plus, our technology has progressed in such a way that we know we will be able to. The risk versus the reward is too great to ignore.
Figuring out how to colonize planets will literally change everything forever. Mars has extremely useful natural resources (minerals, gasses, etc.) and some not even discovered yet. We could make so much new technology that mankind could quite possibly have a longer life span. We can deliver that new tech back home and improve our daily lives.
We will also have a higher sense of unity as a world, since everyone will be working together to achieve one thing. Although Mars colonization IS expensive, it's priceless. We would get so many new opportunities. Mankind can now also discover new planets from a DIFFERENT planet. We will be able to develop towns & cities in a DIFFERENT planet. We would even be able to rule over, discipline, farm, mine, and possibly export the core of a DIFFERENT planet.
We would get rid of any overpopulation, agriculture, and global warming problems, simply by using mars as an output for all of them.
In short. Mars will save humankind and push us into a new age.
Yeah I do agree somewhat that mars does not hold much to be cultivated although the fact stays that we did not see the moon without first penetrated the atmosphere, we would have never made the International Space Station without ever landing on the moon and experiencing space for a longer time. All I am saying is that its a good step in a right direction. Secondly lets be honest climate change is in action, nuclear power is easier than ever. In fact we have the power to blow the earth up. We eventually will need outer space civilization, what better than mars. And if everyone starts delaying the step to mars, then maybe one day we will be too late and some stupid country like North Korea will blow the world ceasing the existence of human. And with quantum mechanics and dark matter being still a mystery to humans you actually never know there being something out there than can change the world. Remember when radio waves were being researched we would have never guessed that it could help us communicate.
Of course we should colonize Mars. First we would preserve our species, so if an extinction event happened on Earth, the colonizers of Mars would continue the human race. Second, It would help us find out if their are microbes on Mars since Mars has ice and used to have oceans and lakes. Finally, it would lay down the foundation for a possible human galactic empire, since Mars could be used to launch ships towards distant planets, due to its low gravity and proximity to the gas giants and their moon's.
Mars has nothing that we need to survive. That means everything we need will have to be sent there. If anything goes wrong at all with any resource production, everyone is dead long before anyone can come to aid them.
In reality, you could pick any point on our globe and have a much easier time creating a livable space and if things do go wrong, you have a much better chance at help arriving in time.
A colony on Mars would not just need to bring resources that may be reused like water or air but would waist resources such as fuel to get there and back. This does not count the billions it would cost.
I have an idea. If you really want to colonize mars, pay your own way. Why should millions of tax payers fund a colony that they will never be part of? From what I understand, there is a person trying to do just that. According to the article, they hope to eventually have a colony of about 80,000 people. Each person would pay about $500,000. Thing is, this money has to go to creating it prior to sending people, so it's not like you can just sell your home to pay for it. What you would need is to have an extra $500,000 that you don't need. Though that amount of money might get you a nice place here on earth, because so much would go into life support and production of resources. That means instead of a nice place, you have a tinny compartment. Not sure what you would do with your time though or even how you would earn money to stay. Sure, it might be neat for a week or so but I would guess that you would quickly run out of things to do and want to go back. I doubt you would get a refund.
I think Mars colony will use lots of resources and money,with which we can do some more realistic projects such as education,society construction and economic development.Besides,living on the Mars is not secure and convenient.The environment isn't suitable for human's live.Although the high technology can give the possibility of living on Mars,human don't just want to survive on the Mars and they want to have a better life than on the Erath.If human live worse on the Mars,why we should make so many efforts to build Mars colony.