I want to know the answer to the following question:
Who proposed that change was needed in the way business with the Greeks was to be conducted  ?
All the background I'm provided with is that "Notable Greek seafarers include people such as Pytheas of Marseilles, Scylax of Caryanda who sailed to Iberia and beyond, Nearchus, the 6th century merchant and later monk Cosmas Indicopleustes (Cosmas who sailed to India) and the explorer of the Northwestern passage Juan de Fuca.". Is that enough to answer the question?