Martin Luther, John Calvin, and other - reformers inspired millions of Europeans to challenge not only the theology of the - Church, but also their political institutions and leaders. Europe divided into warring Protestant and Catholic states, and their rivalries flourished in the Americas as well, greatly influencing the future - of the Americas.

True

Explanation:

Both Martin Luther and John Calvin were hugely influential in European religous history. They challenged the authority of the Catholic Church, and the Pope in Rome, and inspired state leaders to reject catholicism, and embrace protestanism in their territories.

These events led to several violent episodes, including the Thirty Years' War, which was fought mostly in the Holy Roman Empire (modern day Germany) among Catholic and Protestant states, and killed millions.

The Protestant Reformation had a great impact in the American Colonies. The English colonies became mostly protestant, and only Maryland had a significant catholic population. The Spanish and Portuguese colonies, on the other hand, became catholic because their home countries were so.