OPINION Correction for “Opinion: To understand how migrations affect human securities, look to the past,” by Jeffrey H. Altschul, Keith W. Kintigh, Mark Aldenderfer, Elise Alonzi, Ian Armit, Juan Antonio Barceló, Christopher S. Beekman, Penny Bickle, Douglas W. Bird, Scott E. Ingram, Elena Isayev, Andrew W. Kandel, Rachael Kiddey, Hélène Timpoko Kienon-Kaboré, Franco Niccolucci, Corey S. Ragsdale, Beth K. Scaffidi, and Scott G. Ortman, which was first published August 5, 2020; 10.1073/pnas.2015146117 (Proc. Natl. Acad. Sci. U.S.A. 117, 20342–20345).
The authors note that references 1 and 2 appeared incorrectly. Reference 1 should have been the United Nations (UN), Migration, which is currently listed as reference 2. The correct reference 2 was omitted from the article, and is included below. Additionally, the citation to ref. 2 on page 20342, left column, first full paragraph, line 3, should be omitted. The article has been updated online.
2. E. Alonzi, N. Daly, G. Gordon, R. E. Scott, K. J. Knudson, Traveling monastic paths: Mobility and religion at medieval Irish monasteries. J. Anthropol. Archaeol. 55, 101077 (2019).