This mini book briefly covers the historical, cultural, and political impacts of what most of us think of when we hear about "the plague": infections with the bacterium Yersinia pestis. In its three main eras (we are at the tail end of the third, per the author), this bacterium and its strains have wrought incredible population damage and had a reverberating impact on history, even falling into the (ironically used now, in my opinion) common vernacular with phrases like "avoided like the plague".
My biggest takeaway is my amazement at how little humans change. It is easy to write off humans who lived even just 200 years ago as being different creatures entirely, but we are ever the same, repeating cyclically the same dramas and tragedies. Reading about historical people lamenting about strict disease control policies like certificates of health and mandated quarantine while traveling, about the medical community dismissing modalities of transmission despite evidence to the contrary, about the way people coped with mass death - it's a mirror.
However, I don't think that this excuses our behavior in our current pandemic. It's also easy to look at this as absolution - "well", one might say, "humans are just going to be human". But I think the failure to look in the mirror and then make an intentional change is a pretty poor reflection of what people are capable of. We can and do deserve better. We don't have to look at the mass death that has happened in the last four years and say "that was ok". We have more of the means and the knowledge to make change and yet we seem to find ourselves unable to.
I don't know the answer to this, and many philosophers much smarter than I have pondered this questions for ages. I don't think it's naïve, though, to hope and work toward a better future. For everyone.