"Scientific" American blogger argues that it would be tougher now than thousands of years ago to adapt to a little warming because now we allegedly have "more mobility constraints"

Earth has been this warm before- what’s different now? | Plugged In, Scientific American Blog Network

The last time the planet was this warm, humans had mastered bronze metallurgy (huzzah!), and warmer temperatures and our new found technology helped fuel agricultural expansion that ultimately allowed city-states to exist.
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So yes, I’m worried. I’m worried that we have goosed the climate system in the last 100 years or so, and we’re moving even slower than the climate at adapting to the coming changes. Changes that have happened throughout our history, as we can see, but now with more mobility constraints and greater resource dependencies.