As we descend into the consequences of overshoot there is no demarcation of before and after where everyone one day was ignorant and the next day cognizant of peak oil and related symptoms of overshoot. Like the hour hand of a clock the unwinding happens as people continue to go about their lives.
For this reason we see many posters here claiming that peak oil still hasn't happened or hasn't caused any major disruption on one hand and others who bring forth evidence that it does.
Both sides of this polarity are actually mistaken.
The doomer who sees collapse doesn't quite understand that the whole descent into the die-off will happen with folks still seeing their day to day life as normative and still be caught up in the dramas of survival. There will remain a percentage of the population defending a weakening status quo while a greater percentage increasing become disenfranchised. This descent does not bring with it any real revolution or civil war or even any real enlightenment about the ultimate cause which is indeed overshoot. In fact the disenfranchised very quickly find their new situation as a new "status quo" So doomers can wait in vain until their position is validated. It wont ever happen.
On the other hand those anti-doomers will continue to point to a normative status quo still functioning way down the slope of descent and continue to defend a BAU position. They will always look upon doomers as loser pessimists who are stuck in a fatalism.
You see the whole argument is rather pointless.
Every day is just another normal defined as normal by whatever the current conditions of the time. We will still be calling it a normal day even when we are down to 1 billion humans on the planet.
Jared Diamond does discuss this phenomenon with the last tree standing on the chapter about the Easter Islanders. It is worth a review of that to understand why the polemic exists regarding the doomer vs anti doomer.
Have a nice day

Patiently awaiting the pathogens. Our resiliency resembles an invasive weed. We are the Kudzu Ape
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