Terraforming will not be allowed or feasible because humanity's pointless population explosion will exhaust any discovered planets.

It better to focus on earth first and be at harmony with it.


Cheaper to cut and control humanity than to let the population grow until we need to terraform another planet to spread the disease known as humans.


If there are real intelligent civilization elsewhere who are at harmony with their own planets find out we're spreading the cancer of humanity, they will cut us down like how we cull rabbits.

The Human race have no right to exist beyond earth until they sort out domestic problems of being an earth cancer/parasite.

This journey of ego will not be allowed, if there are others observing us, because we are not ready yet.

It's easier and cheaper to kill people than trying to terraform any planet.


The human race can be saved through necessary and immoral means.


The population can be reduced through medicine and technology and other means.

As long as you cull enough humans before we reach the point of no return, resources can be infinite (plants) and existing stuff can be recycled.


But we have to kill as many humans as possible first to get it back from them. (gold and other metals)


Of course, this is the last resort when attempts to convince religious nuts from having too many children failed.


Eventually all religions would have to be wiped out for the sake of humanity.

We are too diversified as a human race and if we don't change the way we live soon, someone is going to change it for us by force for the sake of the survival of our species,


Logical point of view, these had to be done if we are to survive as a race. It is more feasible than trying to colonize other planets, and risk angering already existing/advanced civilizations.