I've given a bit of thought about this subject, as I think it's important for humans to settle on other planets someday, so all the eggs aren't in one basket, so to speak.
However, to have a successful settlement on Mars, people would have to tackle the issue of economics, as Earth-style economics simply won't work on Mars. There's no way you could have a homeless or criminal class on Mars, as space would be at a serious premium, and I hate to think they'd be shoving people out the airlock because they couldn't pay the rent.
Rather than creating a free-for-all, libertarian"paradise" that many might dream of, a Martian colony would have to be more or less communist in nature, to ensure everyone enjoys the same standard of living and does their part to keep the community functioning. Granted, you'd start off with a society composed of 100% highly intelligent, ambitious individuals who will each do their part to keep the community going, so hopefully this kind of system would work. To keep the cycle going in the following generations, children would have to be genetically engineered to ensure they're just as intelligent and ambitious (and emotionally stable...lol) as their parents, as well as making sure no psychopaths are allowed to be born and grow up. After all, it only takes one nut with a grudge to punch a hole in the dome, and psst, all the air is gone and everyone dies.
So yes, you would have to have a very tightly-knit society of highly conformist individuals who put the common good ahead of their own,
100% of the time in order to make a Martian settlement work. Mars will NOT be a place for freedom-seeking, individualist types, that's for certain...lol.
Are humans ready to settle on the Red Planet? Not yet, in my opinion. A hundred, perhaps 150 years from now, maybe.