Historically, when a new land is discovered and colonized, people eventually revolt and win their independence from their country of origin. When we go to Mars, it is inevitable that people born there will feel no love for Earth and will start a revolution to claim the planet as their own.

I am no expert but I always think that if ever colonize Mars, the generations will eventually not recognize any authority from Earth and will demand their independence and eventually Martian-humans will consider Earth-humans a different class of humans.

Think Spain and Mexico, England and the U.S., etc.