The author is a friend of mine. What I say below is something I've discussed with her.
I think the last great frontier for humanity's "waking up from history" is awareness of group psychology, particularly the psychology of the "other." Ironically, as noted by GCP Grey, widespread access to the Internet has actually made such group psychology worse.
https://www.youtube.com/watch?v=rE3j_RHkqJc
One of the big problems with an awareness of what Noam Chomsky called "irrational jingoism," is that currently society is made out of it. Our organizations and social norms and structures actually use the natural jingoism built into Homo sapiens in order to increase group solidarity.
The cognitive distortions that come out of such group psychology are a big problem online. It's been noted that if you go far enough in either direction of the political spectrum, things start to look the same. Historically, both extremes become militaristic and convinced of a duty to righteous aggression. I would invite hardy and curious souls to plumb both more militant feminist and more militant Men's Rights groups online, and witness firsthand the degree to which both sides can be eerily reminiscent of each other in tone and self-righteous attitude. (For example: Intolerant "you're with us or against us" attitudes.)
As 21st century citizens, we should already be aware of "bait and switch" tactics. We should also be savvy about the psychology of online groups, and be able to read when a group has started to cross a threshold and becomes driven by positive feedback cycles of outrage to garner more attention. We should recognize when the ideology of whatever movement has been thus hijacked to become hateivism. (EDIT: To clarify, what I refer to as "groups" are small-granularity, as in a few person's social networks, not everyone who identifies with a particular label!)
To clarify: my issue is not with either side of any debate. There are a few ideas on both sides of the issue I would agree with. My chief concern is whether the groups in question are self-aware concerning their own group dynamics. Such an organizational awareness was perhaps the chief accomplishment of Martin Luther King Jr. and his compatriots, though there seems to be no awareness of this particular accomplishment in the culture at large.
EDIT: I should clarify what I meant by saying "made such group psychology worse." Creating virtual meeting spaces and virtual online groups is far easier and far cheaper than organizing face to face groups, and the same communication resources also make it easier to facilitate such meetings in person. Much good has come of this. However, it has also created far more opportunities for the incubation of distorted mob psychologies. Often these take the name of some cause or ideology but are distorted in a jingoistic direction.
As 21st century online citizens, we should be as aware of such "bait and switch" with the labels of ideologies as we are aware of the same tactics with regards to name brands. We should be as savvy about the intellectual provenance of an online group's teachings and its actual practices as we are savvy about online shopping or choosing which Kickstarter campaigns to support. If just about anyone can set up shop online as an "activist," doesn't this create the same situation that arises when just about anyone can set up a web store? (Isn't this the same economic situation as with travelling medicine shows?)
From what I have seen online, people are often remarkably unsophisticated about evaluating distortions in their particular group's interpretation of ideologies or activist programs, and largely blind to their own group dynamics. This is especially true when "othering," stereotyping, and group hatreds have taken hold. Most importantly: It is just as true online as it is in-person.