who may do a little better than us...
they may..
but the next generation will have to face a global
population of about 12 billion...
that's not sustainable...
adding to the "next generation" is taking it away from the next
generation...
it is probably a hard-wired thing.. an animal thing.. put as
many of your genetic progeny out there as you can... the hell with
the rest...
and with the help of medical science, the darwinism in this
pursuit doesn't ring true anymore...
maybe in time the generations after us will reach for the stars
.... ad astra ! ... 
our ingenuity as a species has had bad effects on earth and on
other species, but our genius has also recognized the problem ...
our ingenuity has brought us this far ... let's trust our future
generations to do even better ...
and while from a biological standpoint you may be right, that
it's all a biological urge ....
but doesn't that reduce us, debase us, our sentience, our
emotions, our very existence, to nothing more than a puddle of
carbon based juices bubbling in cycles of reactions ? ....
I like to think our collective existence has more meaning than
that ..... 
