We saw a similar video of boundary development over the centuries before, but I like this one as a contrast to it. The first is really default-looking, whereas this one has a little bit of production value.
US boundary evolution
Reviving the Statistical Atlas of the United States with New Data
Due to budget cuts, there is no plan for an updated atlas. So I recreated the original 1870 Atlas using today’s publicly available data.
Unemployment in America, Mapped Over Time
Watch the regional changes across the country from 1990 to 2016.