In 622 C.E., Islam was founded which helped flourish trade. Once Islam was founded, trade increased because Islam linked Swahili city-states to the larger Indian Ocean which was an important part of the trade routes between Africa and Eurasia. In the Southern reaches of the Swahili world the birth of Islam extended the impact of the Indian Ocean trade well into the African interior. Trans Saharan trade brought Islam into East Africa and introduced writing, enriched education and business, and caused a shift in political structures. The extraordinary spurt of urbanization that accompanied the growth of Islamic civilization promoted trade. This was a change because the birth of Islam was during this time period therefore changing trade networks by helping them flourish and helping the growth of Islam. Islam linked many places together therefore helping trade and connections during this time.
During the time of 300 C.E. to 1450 C.E., long distance trade routes became more important than ever. A network of communication and exchange across Africa and Eurasia was present and was important between the trade networks of Africa and Eurasia. Trade in the Afro-Eurasian world was significant because it encouraged specialization, spread ideas and innovations, altered consumption, traded plants and animals, and disease was spread. This was continuity during this time period because trade networks remained of vital importance between Africa and Eurasia by means of what it helped do for the Afro-Eurasian world.
Monsoons helped flourish