Final answer:
In Uruk, the urban dwellers who were not involved in farming were craftsmen, who played a vital role in the city's economy.
Step-by-step explanation:
The urban dwellers of Uruk who did something other than farm were craftsmen. In Uruk, a class of craftspeople, including cloth makers and metalworkers, supported themselves through their skills without engaging in farming. These artisans contributed significantly to the city's economy alongside traders and construction workers who built monumental architecture like temples and city walls.