Map of SOU Master Categories (IMAGE) Columbia University Caption The researchers place the shift to modern political discourse in 1917, as keywords focused on the economy, public spending, government regulation and nation building emerge (covered by "Domestic Policy" in red and "Foreign Policy" in dark green). Credit Courtesy of the authors Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.