I believe the answer is: Assets
Assets would include everything of value that is owned by a certain individual or organisation. Assets is a critical component to calculate our net worth, which being done by calculating total assets - total liabilities. Examples of assets are cash, land, supplies, receivables, etc.
14,000 slaves were imported
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While the region was widely occupied by humans as early as 12,000 B.C.E., historians believe that large civilizations began in Mesopotamia between 4,000 and 3,000 B.C.E. Mesopotamia's development in this period was supported by a series of geographical factors, including rivers and fertile lands.