Go look up the PT or KT extinction events. The PT was particularly traumatic and involved significant runaway warming, including possibly the firing of the "cla

Go look up the PT or KT extinction events. The PT was particularly traumatic and involved significant runaway warming, including possibly the firing of the "clathrate gun". In general the point is, dramatic changes in the climate may be good for future evolved life forms, but they will suck for existing ones.