What were the four khanates during the Pax Mongolica?

Despite the political fragmentation of the Mongol Empire into four khanates (Yuan dynasty, Golden Horde, Chagatai Khanate and Ilkhanate), nearly a century of conquest and civil war was followed by relative stability in the early 14th century

under god i have placed my chiest strentgh and the safe guard to my loyal subjects

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)