From the list on boundaries.
Who am I?
As a teenager, I wondered why my state, Maryland, didn’t include Delaware. Later, at the University of Wisconsin, I wondered why its northeastern peninsula was part of Michigan. Then I started wondering about boring borders -- why Colorado’s and Wyoming’s lines are where they are and not a mile or so so this way or that? I ended up writing How the States Got Their Shapes, followed by The People Behind the Borderlines.
Mark's book list on boundaries
Why did Mark love this book?
Some of our state lines were cultural borders. The Colony of Massachusetts was founded by and for Puritans; Maryland was created for Catholics; Pennsylvania for Quakers. That process continued after the Revolution, regardless of state (or later-to-become state) lines. Colin Woodard’s book explores the founding of such cultural regions and reveals how those not-on-the-map lines influence our differing views to this day.