Availability Cascades

This morning, while reading Sapiens by Yuval Noah Harari, I came across an idea that was new to me. Harari writes, “Chaotic systems come in two shapes. Level one chaos is chaos that does not react to predictions about it. … Level two chaos is chaos that reacts to predictions about it.”  The idea is that chaotic systems, like societies and cultures, are distinct from chaotic systems like the weather. We can model the weather, and it won’t change based on what we forecast. When we model elections, on the other hand, there is a chance that people, and ultimately the outcome of the election, will be influenced by the predictions we make.  The chaos is responsive to the way we think about that chaos. A hurricane doesn’t care where we think it is going to make landfall, but voters in a state may care quite a bit and potentially change their behavior if they think their state could change the outcome of an election.

 

This ties in with the note from Daniel Kahneman’s book Thinking Fast and Slow which I had selected to write about today. Kahneman writes about availability cascades in his book, and they are a piece of the feedback mechanism described by Harari in level two chaos systems. Kaneman writes:

 

“An availability cascade is a self-sustaining chain of events, which may start from media reports of a relatively minor event and lead up to public panic and large-scale government action. One some occasions, a media story about a risk catches the attention of a segment of the public, which becomes aroused and worried.”

 

We can think about any action or event that people and governments might take as requiring a certain action potential in order to take place. A certain amount of energy, interest, and attention is required for social action to take place. The action potential can be small, such as a red light being enough of an impetus to cause multiple people to stop their cars at an intersection, or monumental, such as a major health crisis being necessary to spur emergency financial actions from the Federal Government. Availability cascades create a set of triggers which can enhance the energy, interest, and attention provided to certain events and bolster the likelihood of a public response.

 

2020 has been a series of extreme availability cascades. With a global pandemic, more people are watching news more closely than before. This allows for the increased salience of incident of police brutality, and increases the energy in the public response to such incidents. As a result, more attention has been paid to racial injustice, and large companies have begun to respond in new ways to issues of race and equality, again heightening the energy and interest of the public in demanding action regarding both racial justice and police policy. There are other ways that events could have played out, but availability cascades created feedback mechanisms within a level two chaotic system, opening certain avenues for public and societal action.

 

It is easy to look back and make assessments on what happened, but in the chaos of the moment it is hard to understand what is going on. Availability cascades help describe what we see, and help us think about what might be possible in the future.

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