Hey Westwall, student of history, I'm still waiting for you to show me where the history books said that when Temps were warmer the earth was better.
Here's a wiki entry so it should be dumb downed enough for you to understand...Look up ANY period when the worl was warm and life did extremly well. Evey major positive period of mans history has occurred when it was warm...the Roman Warm Period saw the birth of the Roman civilization, the Medieval Warming period saw the Renaissance of the 12th century etc. Conversely when it has been cold man has starved, died of disease, and been hacked to bits all in an effort to garner more hard fought resources and food because when it's cold IT'S HARD TO GROW STUFF!
"Life
The PETM is accompanied by a mass extinction of 35-50% of benthic foraminifera (especially in deeper waters) over the course of ~1,000 years - the group suffering more than during the dinosaur-slaying K-T extinction. Contrarily, planktonic foraminifera diversified, and dinoflagellates bloomed. Success was also enjoyed by the mammals, who radiated profusely around this time.
The deep-sea extinctions are difficult to explain, as many were regional in extent. General hypotheses such as a temperature-related reduction in oxygen availability, or increased corrosion due to carbonate undersaturated deep waters, are insufficient as explanations. The only factor global in extent was an increase in temperature. Regional extinctions in the North Atlantic can be attributed to increased deep-sea anoxia, which could be due to the slowdown of overturning ocean currents,[12] or the release and rapid oxidation of large amounts of methane.[20][verification needed]
In shallower waters, it's undeniable that increased CO2 levels result in a decreased oceanic pH, which has a profound negative effect on corals.[21] Experiments suggest it is also very harmful to calcifying plankton.[22] However, the strong acids used to simulate the natural increase in acidity which would result from elevated CO2 concentrations may have given misleading results, and the most recent evidence is that coccolithophores (E. huxleyi at least) become more, not less, calcified and abundant in acidic waters.[23] Interestingly, no change in the distribution of calcareous nanoplankton such as the coccolithophores can be attributed to acidification during the PETM.[23] Acidification did lead to an abundance of heavily calcified algae[24] and weakly calcified forams.[25]
The increase in mammalian abundance is intriguing. There is no evidence of any increased extinction rate among the terrestrial biota. Increased CO2 levels may have promoted dwarfing[26] which may have encouraged speciation. Many major mammalian orders including the Artiodactyla, horses, and primates appeared and spread across the globe 13,000 to 22,000 years after the initiation of the PETM.[26]"
Paleocene?Eocene Thermal Maximum - Wikipedia, the free encyclopedia