https://doi.org/10.1177/2056305117750721 Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution- NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage). Social Media + Society January-March 2018: 1 –12 © The Author(s) 2018 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav DOI: 10.1177/2056305117750721 journals.sagepub.com/home/sms SI: Social Media, Activism and Organizations Introduction: New Digital Spaces and Activism The increasing po

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