The trip would simply take too long. If one walked it would have taken an entire year to get to the Middle East, and it is simply not worth it. Trading near their homes for short distances would get them less profit, but ultimately they can have more transactions so therefore more profit. Another problem is the language barrier. Neighboring states would find some ways to communicate, but if suddenly Arab traders showed up in China, the foreign barrier cannot be overcome easily.
Robbers and pirates tried to steal the goods
Robbers and pirates tried to steal the goods
The middle class in Europe arose from traders and merchants who exploited the increased interest in goods and products from foreign lands to build their personal wealth.
Slaves came to ancient Rome through slave traders from Europe and Middle East.
In a pre-mechanical transport and electronic communications age, the size of the Empire stretching across Europe, North Africa and the Middle East made it difficult to communicate information and react to it, making political, military and humanitarian responses even slower and more difficult for timely solutions and reactions.
Because they originated from India and Arabic traders introduced them into Western Europe during the Middle Ages.
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There wasn't much trade outside of Europe in the Middle Ages. Shipping hadn't developed and it wasn't until 1492 with the sailing of Columbus that the New World and old met. The only trade route was the Silk Road and that was late Middle Ages. The Crusaders brought back things, ideas, and skills that changed Europe. Eventually Italy will become the leading traders of Europe.
land transport of goods and services was expensive
Cannabis use and cultivation migrated with the movement of various traders and travelers, and knowledge of the herb's value spread throughout the Middle East, Eastern Europe, and Africa.
The Middle East is not the same as Europe.
They were the Traders, Artisans, Shopkeepers, and Scribes