The circumstances of his birth, some time between 1680 and 1690, and the ambiguities surrounding his death, circa 1734, provide an aura of mystique around the deeply enigmatic Richard Cantillon from Ballyheigue in Co Kerry. A contemporary, friend and later bitter opponent of John Law, he was an economic genius. In the only known publication by Cantillon, the Essai sur la nature du commerce en général, published in 1755, twenty-one years after his death, he provided a brilliant analytical framework or model of an economic system which traced the progression of an economy from a barter, command and closed economy to its development as a market-based, monetised and entrepreneurially driven economy open to international trade and capital flows.