previous ages started by trade of exchanges of goods and no idea was introduced in that age.but gradually people become more wise and they started thinking about convince of their trading system. since they starting trade with metal exchange like gold,l slier, iron, etc. but this was not correct system for trading and business and look forward for another modern techniques that can improve their business. then some people arranged themselves into some governmental system and started living with some rules and regulations. then they feel a unique system of trading and business that can improve their lives. so at that age people like modernization and live like some organised nation. so they selected their governor and kings so that they can control the country.
so from this age modern age of currency and business started
