Before he became your favorite science fiction author (and mine), John Scalzi wrote in several other modes. For twenty years, he blogged regularly at his site, Whatever (that puts him among the first bloggers, possibly even predating the term blog). Virtue Signaling is his latest collection of blog posts culled from Whatever, spanning the years 2013 to 2018.
As such, it is a mixed bag thematically, although political commentary and related social issues are clearly at the fore, considering the big change in political climate that took place in 2016. In addition, Scalzi (once a film critic) discusses movies (all science fiction I believe), plus music, online etiquette, his family, and such.
So why, you might immediately ask, should I buy a collection of blog posts that are available for free online at said blog? The immediate answer, in a technical realm, is that you won't have to sift through many posts that don't qualify for collection -- photos, status updates, entries by guest writers, etc. (I checked a couple of months at random, and only two or three of twenty-plus monthly posts made it into the collection).
And there is also the notion that having it all at your fingertips, whether in print or as an E-book, depending on what you prefer, gives it a familiar feel that encourages reading posts in their entirety and reading the collection in its entirety -- online posts, as we all know whether we admit it or not, are too easy to skim, overlook, or just plain give up on after a while.
But the biggest thing is seeing it all side by side in the context Scalzi intends. There is a continuum of both style and substance, regardless of subject matter (and regardless of the seemingly random but actually quite deliberate organization of posts in mostly alphabetical order), that comes across in reading these essays as a collection. Scalzi has an approach to critical thinking that is consistent and indelible, and to my mind, wholly appealing. In short, he's one heckuva writer, even when he's creating something other than the best contemporary (often comic) science fiction available anywhere.
As a corollary to that, if you are indeed a fan of his science fiction, you may have noticed that while he can expertly tell a straight-ahead story that stands on its own, he always has, if you want to dig for it, a clear subtext. As in the best science fiction of any era, that subtext says more about contemporary conditions than it does about a speculative future. Scalzi is a master at such subtext. Reading Virtue Signaling elevates the themes from sub to center stage.
That suggests another question. What if you're not a fan of Scalzi's science fiction? Not a trivial question, as there is a schism in the science fiction community in which Scalzi is a central figure. I won't get into the whole thing here (look it up if you must), but Scalzi represents one side of the story, at times as a leader, at times as a target. Since much of his political and social commentary on Whatever and therefore in this book is unmistakably emblematic of his side, those coming from the opposite perspective will likely fail to appreciate it.
To which I have this to add, to quote a passage from Virtue Signaling: "you have to learn the skills that allow you to robustly defend your point of view and to abandon that point of view when it is not tenable, and come to a new understanding through the process." I would recommend that all readers apply this process to Scalzi's ideas, regardless of a reader's ideological point of origin. Not necessarily to have minds changed, but to at least put ideas to the test and see if they withstand challenge.
Sadly, this is not likely to happen with Scalzi's detractors, and his fans will no doubt function as the proverbial choir. But as a member of that choir, I appreciate Scalzi's intellectual honesty in offering up his opinions, challenging himself to demonstrate that they are indeed tenable, always with the caveat that they are his opinions and not anything he would impose on anyone else.