What might have happened if there Hadn't been a uniform currency?

Without a uniform currency, trade and economic interactions would likely have been significantly more complicated and inefficient. Different regions might have relied on barter systems or various local currencies, leading to challenges in valuing goods and services and increased transaction costs. This fragmentation could have stifled economic growth, limited market access, and hindered international trade, as businesses would struggle to navigate multiple currencies and fluctuating exchange rates. Ultimately, the lack of a uniform currency could have resulted in reduced economic stability and slower development of a cohesive national or global economy.