They were among the first to develop a system of uniform weights and measures. Their building bricks w<span> This was the first civilization to incorporate urban sanitation systems. Personal hygiene seems to have been a high priority. </span>ere very uniform making city planning easy. <span> Transportation and trade were major goals of these people. Their trade network ran from Mesopotamia to northern and central India. Their empire was economic, not military. </span>
Answer:
The relationship between George Washington and slavery was complex, contradictory and evolved over time. It operated on two levels: his personal position as a slaveowning Virginia planter and later farmer; and his public positions first as commander-in-chief of the Continental Army during the American Revolutionary War and later as President of the United States. He owned slaves almost his entire life, having inherited the first ten slaves at the age of eleven on the death of his father in 1743. In adulthood his personal slaveholding increased through inheritance, purchase and natural increase, and he gained control of dower slaves belonging to the Custis estate on his marriage in 1759 to Martha Dandridge Custis. He put his slaves to work on his Mount Vernon estate, which in time grew to some 8,000 acres (3,200 ha) encompassing five separate farms, initially planting tobacco but diversifying into grain crops in the mid 1760s. Washington's early attitudes to slavery reflected the prevailing Virginia planter views of the day; he demonstrated no moral qualms about the institution and referred to his slaves as "a Species of Property." He became skeptical about the economic efficacy of slavery before the American Revolution, and grew increasingly disillusioned with the institution after it. Washington remained dependent on slave labor, and by the time of his death in 1799 he owned 124 slaves, whom he freed in his will, and controlled another 193, most of whom remained enslaved.
It was caused by the sharp rise in the price of opium was seized upon by some of the Cohong trading houses and smugglers.
<span>Sold their belongings to get a little money and moved to other towns or states.</span>
