How did a city state increase its wealth?

A city-state could increase its wealth through trade, by establishing favorable trade routes and engaging in commerce with neighboring regions. Additionally, they could invest in agriculture, enhancing food production to support a growing population and surplus for trade. Craftsmanship and manufacturing of goods also played a key role, as city-states could produce unique items for export. Finally, strategic alliances and military conquests could expand their territory and resources, further boosting their economic power.