Why is the thirty years’ war significant?

The war lasted from 1618 to 1648, starting as a battle among the Catholic and Protestant states that formed the Holy Roman Empire. In the end, the conflict changed the geopolitical face of Europe and the role of religion and nation-states in society.

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases

the first two years of american revolution was not very encouraging for the patriots since the british were far superior in sea power, arms and troops.