What you say looks more like some giant asteroid hitting Earth, not like a technological disaster. And still less a societal collapse. Societies usually either slowly vanish into nonexistence without raising hell or just get conquered by their more agile neighbors (which is right, in my opinion)...
No, it looks like a normal implosion of a complex society. Instead of the pyramids, the nuclear reactors will be digged up some million years in the future. The maya culture disappeared immediately as well. Our society (globalized the first time in history) will disappear within weeks as soon as the network (internet and/or electricity) collapses.
I don't think it is as globalized as it might ultimately get. Electricity is not globalized at all, Internet is a distributed network at that, thus they cannot simply collapse in the way you think they would (within weeks).
Electricity is getting more complex to hold up (50 Hz) every year. Europe is a supranational network, and the chance for a blackout is growing every year as well.
http://www.zeit.de/zeit-wissen/2012/06/Stromnetz-Winter-Blackout-Stromausfallhttp://www.t-online.de/wirtschaft/energie/id_46657528/bei-stromausfall-droht-kollaps-der-gesellschaft-.htmlIf ever, it surely won't look like a collapse of a unified society. I think you are crying wolf really...
Wait for the next Lehman event. The collapse will undoubtedly be a global one in a globalized society. The USA is not working anymore without China et vice versa. A Bankrun, and the whole society comes to a stand still.