NighSwan, the wars you use as example were fought over a number of years…but how many major battles? Most were skirmishes, engagements with hundreds of troops, a few thousands at most. There were long periods without any fighting. It does not compare with WW I or WW II…when you have continuous fighting going on (if not on one front, on the others). In terms of civilians… LOL In the wars you used to make your point a city will be sacked, hundreds, maybe thousands slaughtered. That’s nothing when compared to civilian loses at Leningrad, Stalingrad, the carpet bombing of Germany, Hiroshima, Nagasaki, the dead and displaced in Korea, Vietnam…now in Syria, Iraq, Afghanistan.
In the old days you might hear about a battle, months after. Now, you see live what’s going on. Big difference.
I'm sorry but I think you are mistaken.
The Dutch War of Indepence was not "a few skirmiches involving at most a few thousand people", it was a really long and costly war that brought the Spanish kingdom to bankrucy,
several times during the war.
The Thirty Years' War involved hundreds of thousands of troups from about twenty countries, and again, the death toll included as much as 40% of all Germans. Not just German soldiers,
all Germans. Korea, Vietnam or even the atrocities of World War II do not even come close to such a proportion: the most devastated country of world war II, Poland, lost about 17% of its pre-war population. The Korean war killed about 9% of Korea's population. The Vietnam war killed no more than 7% of Vietnam's population (and that figure is probably too high). As for Syria today, even the highest estimates don't indicate a death toll over 1.3% of the population (even in absolute numbers, the Spanish Civil War killed more people than the Syrian Civil War... while lasting less than 3 years, whereas the Syrian Civil War is already its 4th year).
Likewise, the War of the Spanish succession involved hundreds of thousands of soldiers, implicated almost every major European power, and was fought both in Europe and in the Americas. It wasn't a "small war": France was effectively seeking to gain the Spanish throne, and thus get control of the entire Spanish empire, which at the time included not only the Latin American colonies, but also large swaths of what is now the US, the Philipines, and large parts of Italy and of the Netherlands. This was the first world war of the 18th century, except the stakes were actually
much higher.
As for World War II, there were in fact periods without fighting: there was no fighting at all between september 39 and may 40 (8 months). The fighting then lasted less than two months and mostly ended in june 40. Then, appart from sporadic and largely ineffective air raids, there was again no fighting between june 40 and june 41 (a whole year).
I insist on using percentages because raw number don't mean much without context. Because otherwise the highest estimate for the death toll of the Taiping Rebellion in the mid 19th century is about 100 millions, higher than even the highest estimates for World War II. Except at the time China already had a population of 430 millions, so about 23%, which is quite high, but among what you expect for pre-20th century warfare; and again this is the the highest estimate, the lower (and most reasonable) estimate is 20 millions, ten times less... and still dwarfing the Korean war by one order of magnitude (but actually inferior to it if you consider the percentages).