Article: Protestant Reformation
Section: Conclusion and legacy

Question: What countries did the Habsburgs rule?

The Reformation led to a series of religious wars that culminated in the Thirty Years' War (1618–1648), which devastated much of Germany, killing between 25 and 40% of its population.
From 1618 to 1648 the Roman Catholic House of Habsburg and its allies fought against the Protestant princes of Germany, supported at various times by Denmark, Sweden and France.
The Habsburgs, who ruled Spain, Austria, Slovene Lands, the Spanish Netherlands and much of Germany and Italy, were staunch defenders of the Roman Catholic Church.
Some historians believe that the era of the Reformation came to a close when Roman Catholic France allied itself, first in secret and later on the battlefields, with Protestant states against the Habsburg dynasty.
For the first time since the days of Luther, political and national convictions again outweighed religious convictions in Europe.
The main tenets of the Peace of Westphalia, which ended the Thirty Years' War, were:
 All parties would now recognise the Peace of Augsburg of 1555, by which each prince would have the right to determine the religion of his own state, the options being Roman Catholicism, Lutheranism, and now Calvinism (the principle of "cuius regio, eius religio")
 Christians living in principalities where their denomination was "not" the established church were guaranteed the right to practice their faith in public during allotted hours and in private at their will.
The treaty also effectively ended the papacy's pan-European political power.
Fully aware of the loss, Pope Innocent X declared the treaty "null, void, invalid, iniquitous, unjust, damnable, reprobate, inane, empty of meaning and effect for all times."
European sovereigns, Roman Catholic and Protestant alike, ignored his verdict.
However, this treaty did not mean that the Reformation concluded.
It would be about another century (ca.
1750) before the Reformation could truly be considered to have ended.
Meanwhile, other reform movements continued to spring up, even within the Reformation churches.
One such movement was Pietism, which impacted the Low Countries (hence the Reformed churches), Germany (hence also Lutheranism), and Great Britain, which led to a split in Lutheranism and which brought about the creation of some new churches (most notably the Moravian Church and Methodism).
In turn, Pietism would branch out into a "normative" form and Radical Pietism.
The Reformation had a wide-ranging influence on personal life.
In fashion, for instance, it led to a more sober and dignified, less wasteful esthetics.
Further impact on the Reformation came from the Age of Enlightenment, and its preponderance of Rationalism.
This would lead to redefined roles for religion, eventually relegating it to second-class status.
In "The Protestant Ethic and the Spirit of Capitalism", Max Weber first suggested that cultural values could affect economic success, arguing that the Protestant Reformation led to values that drove people toward worldly achievements, a hard work ethic, and saving to accumulate wealth for investment.
The new religions (in particular, Calvinism and other more austere Protestant groups) effectively forbade wastefully using hard earned money and identified the purchase of luxuries a sin.