I don't recall Global Cooling.
I do and there is still a small minority of climatologists that are worried about it.
Between the 2 "Global Cooling" is by far the most distructive. In the past there have never been aything but positive effects (on humans and animal life in general) from past periods of "Global warming". However, even the mild "Mini Ice Age" of the 12th cent (it lasted longer, but that was the period of during which the drop occured) had devistating effects on much of Europe and the Northern hemisphere.