I too read "Facing Extinction" (Catherine Ingram) and would state that she puts into words my thoughts and concerns very eloquently.
However just a few thoughts regarding some of the posts:
First - to answer your question - Humankinds future? I foresee a very poor one indeed.
When the means of production breaks down societal collapse will soon follow with all of the associated
horrors one would expect when this occurs.
As far as Humans "changing" behavior, I suspect that by the time enough people get on board to participate in environmental and ecological change it will be far too late to initiate actions that will preserve the current state of being. Perhaps a "better" way to put it is to expect a dramatic population adjustment.
Ms. Ingram seems to suggest it may get so bad as to lead to human extinction.
So Daniel our politicians, leaders, religious persons and demographic planners have all "FAILED US" and continue to do so. I'm sure you understand that any real "change" requires the Political will of the politicians and the citizenry to make those changes, such as:
Strict Birth Control / Negative growth is immediately required of every nation on earth. (Reference the Chinese example of not long ago) "Discontinued by the way"
Complete re-orientation of the means of production.
Giving up "Meat" in the Human Diet.
Immediately stop capitalistic "consumption" economics.
Clearly there is NO WILL in the WORLD to implement these changes.
I suspect the GOP may re-consider there current perspective when the House of Representatives is under water.
Probably nothing until then.
Humans were given a "garden of Eden" and despoiled it (sadly for the benefit of a very few).
It is tragic that humans will take down as many so many species, murder really. Extinction Murder.