...Elrond tells Aragorn that he must “either to rise above the height of all your fathers since the days of Elendil, or to fall into darkness with all that is left of your kin.” For better or for worse, we have degrees of failure with which to content. Every fraction of a degree we can prevent the planet from warming will result in a better possible world; every delay of change will bring commensurate loss of life and make a harder world to survive in.