Nonsense. We've already established the opposite is fluffycrystalfairyunicornwings.
I agree that My Little Pony is probably pretty opposite of grimdark fantasy.

But, again, you're trying to disappear a lot of authors. There was a ton of graphic stuff in the 1800's because they had things like public hangings and slavery. Their relationship with violence was a lot more clearcut than our modern age -- they didn't see graphic material as necessarily a problem, depending on the type of publication. And that continued well into the World War II era. Conan was not a nice person when Howard invented him for magazine publication in 1932:
The fifties were filled with pulp stories that were incredibly graphic, including plenty of rape, rape presented as sex, icky monsters, brutal murders, torture including by the good guys, and actually a fair amount of anti-heroes and successful villains. The 1970's were all about sex, including rape, S&M, and the 1980's were all about bare breasts, bloody horror and violent action, including the dismemberment of women and a lot of splattergore and slasher films. There were graphic novels, underground publishing, commando bloodfests, etc. There is a whole line of authors who wrote graphic, edgy, gritty, noir nihilistic, bloody, amoral, horror, military, etc. stuff stretching over decades. While it may feel a little icky to think that our grandparents and parents read that stuff, and while it seems to make us feel supercool to say that we're the ones making the really gritty, edgy, dark violent stuff way beyond what has gone before, we're not.
What makes grimdark separate is because a group of authors around the same time were going for a very similar look, sound, themes and types of settings and characters in secondary world. And then that word, having stuck, becomes a useful way to refer to other books in the same neighborhood as a reference point. It will pop up periodically. There may be a new "grimdark" generation down the road that is seen as another movement. And certainly some of the stuff that the authors of their time tackle is of their time and of conflicts and mores in that time. It's specific.
But when you compare grimdark's graphic levels to say Leisure Books horror novels of the 1980's, it's actually on the lighter side of a lot of it. Grimdark, in fact, uses bursts of violence as punctuation between longer spells of moody, entertaining posturing. That's what sort of makes it dark fantasy, as opposed to horror. And in terms of sexual content, grimdark is very light on that, especially compared to the 1960's-1980's period. They like battle scenes more than sex ones, even rape ones. And most of the content of Martin's Song is straight out regular political epic fantasy and contains not that graphic battle action. (The t.v. show goes for a more lurid take on the story.)
Alchemist, I'm sorry that I confused you -- I was responding to everybody posting in aggregate, not saying that you said all those different things. The only time I was responding directly to you was at the top of the post, when I quoted you. But let's tackle some of what you brought up:
Alchemist said:
But I do think that he probably thought something like, "Wow, those guys are making a killing on writing big fat fantasy - I should give it a shot, but I'm going to do something different, something edgier."
No, that wasn't his goal. Bear in mind that big fat fantasy was a staple starting in the 1970's, long before Song. And lots of big fat fantasy didn't sell or sold mid-list. What made a series a hit was not it being big and fat, but word of mouth that led lots of people to hear of it, try it, like it, and spread more word of mouth. (Fiction has been doing viral for a very long time.)
Martin was a successful film and t.v. writer and producer, which made him a ton load more money than doing written fiction. He in fact had written very little fiction for awhile because of his Hollywood career. But he got tired of being paid for scripts which so seldom got developed into actual productions (because that happens to everybody in Hollywood,) and so he decided to take a break and try something totally different -- a big epic fantasy trilogy based on historical wars and stuffed with fantastic elements and a gigantic cast and scope -- a series that would be deliberately impossible to ever film but which you could do to your heart's content in written fiction. And because he did have the big Hollywood career, as well as a respected SFF writing career from way back, his publisher was eager to take it on. It did get a fair amount of publicity from the publisher from that, and Games was a category bestseller, but it did take a little while to build the word of mouth into a bigger bestsellerdom with a rabid cult following as well.
And while Martin was bearing in mind that he wanted to go the Moorcock route rather than the Tolkien, with being more towards historical fiction than mythic poetry like Tolkien, edgier was already in epic fantasy. Donaldson, Kay, Cook, Gemmell and countless other writers were doing graphically violent and edgy. Dark fantasy has been a sub-category of fantasy since the 1800's. Martin was great with the shock plot twists, but most of what he was doing was no edgier than a lot of the 1980's and 1990's sec world fantasy being put out. You have to remember, epic fantasy has been huge and churning out thousands of titles for nearly fifty years. The two things that really drew people to Martin weren't especially the dark material. It was A) the gigantic scope of the attempt (much like with Jordan,) and its relationship to historical and military fiction (some tried to call it historical fiction; ) and B) his deep submersion into each pov character, giving each full chapters when they were on deck within the context of such a large epic, (some people only read the storylines of the pov characters they like.) The Martin is the author of all darkness stuff didn't start coming up until into the oughts, when people kept trying to declare oughts authors somehow breaking with the writers in the 1980's and 1990's and being way more supercool dark and edgy. Since a lot of the writers from then are still around and publishing, that sort of irked a lot of them. Basically, Martin has very good word of mouth voluntary spin doctors (not that I don't love his work.) And so does grimdark.
Now what I find worrying is that grimdark has dominated epic fantasy for a decade or more, it seems. I do think this has a lot to do with the popularity of Martin, his influence, and in the last five years, the HBO show. Grimdark is in. I do hope that it will fade, though, or at least we will see a new wave of less grimdark-focused epic fantasy.
It really hasn't dominated secondary world fantasy. Grimdark is actually a fairly small group of fantasy authors. They just happen to be beloved here in this forum, so it just seems like they run the world.

Remember, secondary world fantasy is a huge general category and not everything in it is a giant war novel, and certainly not a nihilistic, Gothic barbarian novel. Jacqueline Carey is a much bigger author than Mark Lawrence (though Mark is working on it.) I can come up with a list of ought and teens fantasy authors that will run for days who aren't grimdark and who are big in the field and big sellers. We don't have to wait for a "new wave" -- we have fifteen years of countless titles already. Likewise, grimdark is nowhere near all of dark fantasy. It's just a sub-group of dark fantasy.
Kay isn't grimdark, as he's a much older author. He's just an ancestor of it, who uses dark and graphic material. As for whether he fetishes it, I would say that varies depending on the book. I certainly felt that he did so in his first trilogy and badly. His writing for me improved in his later works. Grimdark isn't that interested in making a fetish of violence, sex or even moodiness. It's more interested in philosophical themes of desperation, frustrated attempts at redemption, how people are turned monstrous, western themes of expansion and appropriation, ruthlessness in politics and war, etc. In many ways, it condemns violence and war, with characters trying to move away from those things to varying degrees of success.
Kingsman said:
The Sword of Truth series has seriously dark stuff all throughout it. The main characters get raped, tortured, enslaved etc and from memory Goodkind doesn't shy away from showing it. So it's full of all the cool stuff the grimdark crowd like, so what's stopping it from being described as Grimdark?
1) Time period. Goodkind started writing his series in the 1990's. He's not part of the nucleus of authors in the last ten years. He might be an influence to some of the grimdark writers, but stylistically, he has little in common with them.
2) Style and themes, which make up the movement and tone of the sub-sub-category. Grimdark isn't about the graphic violence. Lots of fantasy stories have graphic violence and dark elements. It's about the
consequences of graphic violence. About living a life, having to live a life, of graphic violence. Grimdark employs tragedy -- its characters are broken, despairing, attempting redemption or revenge, sacrificial, turned amorally ruthless and savage in varying degrees. It uses a setting and atmosphere of dystopian chaos -- horrific, war-torn, mysterious, nihilistic and fatalistic, in which characters are tossed like a ship on rocks in a storm.
To borrow Lord Grimdark's characters, Logen is a magically cursed beserker who keeps trying to escape violence and leading men into battle, who causes the death of those he loves and hates alike. Glotka was a promising but feckless military officer taken prisoner and broken in body and spirit, to in turn break others and scheme from the shadows while at the same time often trying to save the world from worse horrors. Jezel is also a promising but feckless military officer, who is slowly broken down by his dreams of glory and the manipulation of others into a puppet king. And so on and so forth. If you want to put it in its simplest terms, grimdark fantasy is thematically about the Fall from Heaven.
In contrast, Goodkind's themes involve righteous leadership, the demands of duty, objectivist libertarianism values about inherent merit, heroic defiance and victory, etc. While some of his characters are broken and make hard, questionable choices morally, those aren't the main themes of the series. It's called The Sword of Truth, not The Sword of Despair. So it's not grimdark even retroactively. It's doing a different sort of story.