What are some ways the Black Death could have been stoped

The most popular theory of how the plague ended is through the implementation of quarantines. The uninfected would typically remain in their homes and only leave when it was necessary, while those who could afford to do so would leave the more densely populated areas and live in greater isolation.

It can provide a social code to protect each citizen's future economical earnings. and then obviously defending the country from invading countries.

Ain the free market economic system the government is hands off from all supply and demand rates