What can modern nations learn from the ming dynasty?

That a dynasty can translate into lots of income for another thousand years by naming restaurants after said dynasty. Hope i helped

Ming Dynasty were endowed with the best construction skills. Besides, a skill that could be adopted from them, is their capacity to know when, how would be the right time to refurbish certain items. Moreover, they had an open mind about trade of local commodities by water or land. They also considered that it was important to have available and prospering farming.

Ming Dinasty was made up of really wise and intelligent people.

in griswold v. connecticut (1965), the supreme court ruled that a state's ban on the use of contraceptives violated the right to marital privacy.