why the caps on Baby Boomers?
Interesting question. “Baby boomers” is, I understand, a term peculiar to the U.S., referring to the increased rate of population growth observed there after WW2. In other words, a unique, once-off phenomenon, like WW2 itself, or the Wild West, or the Lost Generation (does anyone still use that expression, apart from social historians?). In that case, surely, isn’t it just as appropriate to write Baby Boomers as it is to write World War Two? Why not caps on baby boomers? Why are lower case initials “better”? Before the above question was raised, I’d have capitalized Baby Boomers myself, if I’d ever had occasion to write the phrase. For non-Americans (who are, I suspect, the majority of the world’s English readers, though I haven’t tried to count), the capitals serve to emphasize the particularity of the term.
Aside: When, and how, did “particular” come to have the senses it does today, so different from, say, “particulate”?
(Edited to replace “speakers” with “readers”, which makes much more sense)