Unfortunately I can't view the actual video (an infested laptop's driven me to hoping around public access terminals) but I think I've got the gist of it: this git has written a book, and is thus promoting it. Said book is about how 'stupid' or 'dumb' the 'millennial' (anyone under 30, I presume?) generation is. He's using highly questionable sources, most of which are statistics or anecdotes, making them immediately suspect anyway. His target is American youth, and the major factors of modern idiocy appear to be: the American educational system, poor parenting, the internet/technology boom, and the generation itself, as a result of the previous three factors. The big issue seems to be that he is generalizing his sample/studies/whatever he did that qualifies him to say what he's saying to the population (i.e. everyone he's never met). This is a big no-no. If I missed an important point please let me know.
The most blatant first point, in my mind, is: if technology (judging by everyone else's comments that seems a big issue with him) is devolving us into gasping fish creatures, why have so many other tech obsessed countries not found the same fate? I'm sure someone can forge a comeback to this and deliver it via rapier wit.
Surprisingly no one has pulled the, always fun, IQ argument against this guy. There are a fair number of studies suggesting, to the point where it has been mentioned in several of my psychology text books, that the average IQ has significantly increased with every generation. I'm lazy (gasp!) and already approaching long winded, so I won't bother with links no one will investigate. Also: statistics. Ick.
However, many have mentioned the idea that people are well versed in what interests them. Others have dismissed this point, arguing in favor of a well rounded, overall education. Since I'm already skeptical of the validity of IQ testing (outside determining if some one is, say, functionally retarded for legal reasons) I'm not going to hold it up as some shining beacon of a solution to the argument, partially because it tends to favor the second opinion.
But this idea of different types of 'smart' is already being, and has been for a while, investigated by psychology and sociology. I personally subscribe to the theory, and think that the U.S.'s role as a 'melting pot' has something to do with this 'you're all dumb!' ranting. Think about it; most of us have lived their lives in a highly diverse society and culture (if you have internet connection I, optimistically, believe you do live thusly). Different cultures value different forms of knowledge and, regardless of whether the parent is good, bad or even competent, this is impressed upon the offspring through the family.
This is also where the old generation vs new generation conflict might arise: mom and dad moved to the U.S. right after they were married and had you. They wanted you to have a better life here than 'back in the old country' and you, in living that better life, have found you want to pursue the fine, nuanced art of socializing when dad thinks you should be learning how to hoe potatoes. Where or why you're going to hoe potatoes in the suburbs no one knows, but it's his opinion and he's grumpy. You buy him a hoe as a joke gift for the holidays. Gardening tool based chaos ensues. Mom blackmails you photographic evidence of the holiday you 'ruined' until her long over due death.
Or maybe they were just average middle class all American Joes and Janes who wanted the average middle class life for their family. Their kid hits adolescence and starts attempting to tamper with their assembly line lifestyle. They join the student amnesty international group. Mom and dad, who meddled a bit in the hippie movement back in the day, uneasily encourage them. Then the kid spends alot of time online, refuses to do sports, dyes his hair. Mom and dad are getting upset. Kid comes out as gay and moves in with a group of other homosexual teenagers at 16. Dad disowns kid. Mom still writes letters (she never figured out the email), and is always commenting on how nicely the kid and his boyfriend have decorated. The kid's otherwise doing alright for himself.
I won't use anecdotes, because I experienced a less than conventional childhood and adolescence, but I will say I'm the product of a mixed marriage as I'm sure many of you are. I also live in a major metropolitan area and go to a state university with a highly diverse student population. I talk with my peers and have a difficult time finding people I think are outright stupid. Even in high school I found locating out and out morons a challenge. When there's a disagreement it's more often than not because we're approaching the topic from completely different places; I would hate to be a business major, but I came from a financially stable home and don't have to work three jobs to get through college. I'm not looking for a stable nine to five when I graduate. When I confuse people with 'big words' it's often because they're bi-lingual, which is more than I can say for myself (literally, ha! Terrible pun). Sometimes it's because I'm using words common with my culture, but not theirs. If they should know the word it's usually me mocking them for their lack of knowledge. People complain about idiots constantly, but really, we're all idiots to someone at sometime, yeah?
God I'm tired. What the hell was I talking about again? Was I going somewhere with this? Oh. Yeah.
Right, so, generalizing to the population = bad. Don't do that. Of course, it's all merely my opinion. I feel like I should write more, but I hear the tiny screams of 'god no! enough! quiet already!' and my desire to always address and analyze a topic from every conceivable angle and go off on rhetorical tangents is wearing on even my nerves. I feel bad for my TAs.
p.s. Regarding knowledge of history? You just need enough to realize that everything has more than one, and almost inevitably hundreds, of causes. For some this means lots and lots of history classes, for others just one (and presumably a really good history teacher). Again I'm optimistic that that will color most topics one thinks about thereafter, encouraging further research simply for the sake of knowing.