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This article from The Atlantic features two interactive maps produced in part by Esri. One allows you to investigate recent Census data by exploring rates of county-by-county population growth alongside the sources of their growth (or decline): http://storymaps.esri.com/stories/2014/census-county-population-change/. The other draws on a compilation of 175,000 historic USGS topographical maps. You can select an area you’re familiar with and go back through time to see how the selected landscape looked at other points in history: http://historicalmaps.arcgis.com/usgs/.