In what ways did long term commerce act as a motor of change in premodern world history?

-exchange led to the creation of larger, more powerful states

-the spread of Buddhism and Islam

-spread of epidemic diseases beyond local regions, with sometimes devastating effects

-spread of plants, animals, technological

-It altered consumption patterns

-encouraged specialization and diminished the economic self-sufficiency of local societies

-means of social mobility, traders often becoming a distinct social group

-Gab between rich and poor grew

-New civilizations developed along roads, places for merchant to stop

accelerated heartbeat, raise in blood pressure, slow in digestion, raise in blood sugar and perspiration. (myers' psychology for ap 2nd edition pg 87)

answer; clean work space and clothing using compressed air;