Read here. For some 400 hundred years, the Inca empire grew and thrived in the Southern Hemisphere due to the arrival of global warming during the Medieval Warming period. Climate alarmists claim the Medieval Warming Period did not exist in the Southern Hemisphere.
"the success of the Inca was underpinned by a period of warming that lasted more than four centuries....The four centuries coincided directly with the rise of this startling, hyper-productive culture that at its zenith was bigger than the Ming Dynasty China and the Ottoman Empire, the two most powerful contemporaries of the Inca."
