If Terra Nova were meatier, we who take it way too seriously would have something worth talking about.

"It takes a human mind to believe it’s not worthy to live." Profound. We have a rich heritage of finding reasons not to live. Guilt the majority by weight, but concepts of honor/shame and irredeemable sin rank right up there.

In the case of allowing humanity to succumb to self-inflicted ecological disaster, I think that the moral question can be judged somewhat objectively by asking how much else of the Earth's biosphere are we destroying along with ourselves? In other words, is it a victimless crime? Or is there a real victim to be made whole, or future victims to be protected?

Maybe there's a less negative way to rephrase your sentence: It takes a human mind to conceive of a moral framework so broad that it can weigh the rights of one species against the needs of all of a planet's life.

Of course, the jury's still out as to whether the human mind is actually capable of such large-scale thinking. In any case, nature/evolution/Gaia will judge us whether or not we want to be judged.