"tea was really useful. It gave an excuse to talk to everybody." not the first time I see something and think sir Terry loved tea too :)
Social commentary embedded in funny fantasy is Pratchett's forte, but this might be the finest example of it yet. If you're looking for commentary on geopolitical/religious conflict, the uselessness of Othering and prejudice, I'd first recommend Jingo, Thud or Small Gods. If you're looking for equal page time for non-human teammates, I think any of the City Watch books are a better bet. But arguing against misogyny? This is THE BEST.