The free rider problem<span> is a market failure that occurs when people take advantage of being able to use a common resource, or collective good, without paying for it, as is the case when citizens of a country utilize public goods without paying their fair share in taxes.</span>
I found one which is René-Robert Cavelier
A Trireme is powered by about 170 oars men
The contract Chain was a series of a league, federation, and treaties formed and specified during the 17th century, mainly between the Haudenosaunee or Iroquois Confederacy and the British colonies of North America, joined with Indian tribes. First elaborated in specified degree area of New York at a time of cruelty and social uncertainty for the community and Native Americans, the Iroquois, and English committee, and future treaties were based on supporting peace and solidity to conserve and sustain trade. They inscribe issues of inhabitant settlement and tried to subdue cruelty between colonists and the tribes of Indian.They even declared its neutrality.
Cities served as major centers of exchange particularly as centers of commerce between the east and west. Some cities not only imported products, they also made their own. During the Renaissance the cities of Italy were (especially in the north) were the largest in Europe, their culture the most urban which made it easy to usher change during the Enlightenment
