Describe the Pre- modern World?

From ancient times, travellers, traders, priests and pilgrims travelled vast distances for knowledge, opportunity and spiritual fulfilment, or to escape persecution. They carried goods, money, values, skills, ideas, inventions, and even germs and diseases. As early as 3000 BCE an active coastal trade linked the Indus valley civilisations with present-day West Asia. For more than a millennia, cowries (the Hindi cowdi or seashells, used as a form of currency) from the Maldives found their way to China and East Africa. The long-distance spread of disease-carrying germs may be traced as far back as the seventh century.