Seeing that humans are the principle cause of the current on-going mass extinction event, I wouldn't feel it a terrible loss if Homo sapiens ended up being one more statistic in the three and a half billion year history of life.
I'm attached to the current ecology because that is what I know. On the other hand haven't the mass extinctions opened up niches with the result of new species having opportunities, like dinosaurs being replaced by mammals?
I personally don't like all this extinction but change seems to be the theme of the universe and perhaps we are the agents that will clear room for the next new whatevers to develop?
This is more a musing than a theory.
lfen
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