If you want to determine whether the violence level has been increasing or decreasing, one good measure is to compare religious persecutions of the past, with political persecutions of the twentieth century. There is no comparison. Political persecutions were enormously bloodier, and the political persecutors were generally admired in their time, whereas their religious equivalents were condemned in their time.
Someone who executed two hundred religious heretics does deserve the title Bloody Mary.
You say she only got the title for being a Catholic. Well then, who is is the protestant King or Queen of England who better deserves the title?
You say the Spanish inquisition was demonized merely because it was Catholic. Well then, what protestant inquisition executed a dozen or so heretics a year for a few centuries?
The fact is that Bloody Mary and the Spanish Inquisition were pretty much as bad as it got, and that is why they have the bad name that they do have. But modern leftists who only murder a few thousand or so get sainted, because the usual thing a few hundred thousand.
If you want to determine whether the violence level has been increasing or decreasing, one good measure is to compare religious persecutions of the past, with political persecutions of the twentieth century.
Hmm... It'd be an interesting project to calculate P(Violence) (the likelihood a person will have significant violence inflicted on them) for various time periods, and also the equivalent P(Violence|Activity) for various activities (religious disagreement, disagreement with your nation's war, proclaiming the ruler of your nation to be a nincompoop, ...
I wanted to bring attention to two posts from Razib Khan's Discover magazine gene expression blog (some of you may have been readers of the still active original gnxp) on the polemic surrounding Pinker's The Better Angels of Our Nature.
Relative Angels and absolute Demons (and the related But peace does reign! )
I generally agree with some of his arguments, but found this quote especially as summing up some of my own sentiments: