the reasons for chess declining in popularity are numerous......... as you suggested, political pride was a big factor in the game's popularity......... additionally, intelligence is looked down on and ridiculed in mainstream american culture today, with the ideal person being presented as just about anything but a chess player......... i mean, chess players are portrayed as guys (cause we all know, "ladies don't play chess") who are in the a/v club, are physically weak, are soft or homosugarual......... just pretty much whatever the stupid people want to say them has been ok......... maybe that's too hard of a view of it, but it seems to me to be true......... i mean, it's just not "cool" to play chess......... but i don't think that's the main reason why chess has declined in popularity.........
before i say this i want to qualify it......... i love chess......... i have played since i was 8.........
that being said, chess kinda sucks compared to other games today......... if you can beat someone at chess, you can do it like 5 in 6 or 9 in 10 times played......... that sucks for the weaker player......... to find a good match is hard......... you might be the proper player in your group of friends, but if you go to the local coffee house you might not be able to beat anyone there......... everybody that i know that i can have a face to face game with, i can beat consistently, so nobody shall play me......... when i moved to where i live now, the local guys who grew up around here played a little chess and there was one guy who was supposed to be the proper......... we played, i won 6 in a row......... he was almost ready to fight over it......... i get online and i'm a nobody......... lol it sucks......... there's no luck......... it is a game of pure skill......... people shall read this think "like baseball or basketball" but they would be wrong......... there are no puddles of sweat on the floor, no wind, no chance of a sprained ankle......... people want a game that's not going to involve losing the first 50 or 75 games they try and play......... besides that, chess is a real low-tech strategy war simulation......... today, if i want a strategy war simulation, i use my computer and replay historic or fantastic battles in a graphically created world......... chess sucks big time compared to command and conquer or civilization.........
bottom line, chess is way past it's prime and even without the dumb people ridiculing away anything resembling thought, it's on the way out......... but, i'll still play it, even online where i'm target practice for far smarter men, or some dumber ones using a cheap program to let their computer think for them......... if i keep practiced, then i can still rout the newcomers, maybe.........