2016
DOI: 10.1126/science.aaf0675
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New online ecology of adversarial aggregates: ISIS and beyond

Abstract: Abstract:Support for extremist entities -whether from the far right, or far left --often manages to survive globally online despite significant external pressure, and may ultimately inspire violent acts by individuals having no obvious prior history of extremism. Examining longitudinal records of extremist online activity, we uncovered an ecology evolving on a daily timescale that drives online support, and we provide a mathematical theory that describes it. The ecology features self-organized aggregates (onli… Show more

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Cited by 107 publications
(107 citation statements)
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References 26 publications
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“…These results might be relevant to other informal contexts in which violence occurs, such as urban gangs (35), localized insurgencies (14,50), revolutionary protests (10), or terrorist attacks (16). Many types of violence do not depend solely on the desires and actions of individuals or even dyads, and instead may at least partially emerge and be supported by the very social structure in which all individuals are embedded (51).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…These results might be relevant to other informal contexts in which violence occurs, such as urban gangs (35), localized insurgencies (14,50), revolutionary protests (10), or terrorist attacks (16). Many types of violence do not depend solely on the desires and actions of individuals or even dyads, and instead may at least partially emerge and be supported by the very social structure in which all individuals are embedded (51).…”
Section: Discussionmentioning
confidence: 99%
“…Evolutionary models have credited collective violence with an important role in the development of modern human behavior (2-7), whereas cultural and ecological factors have been shown to influence small and largescale violence (8)(9)(10)(11)(12)(13). More recently, there has been increased interest in understanding the dynamics of group-based violence and the social processes that can contribute to it in the setting of insurgent and terrorist groups (14,15); for example, online records suggests small, self-organizing groups coalesce into larger groups preceding terrorist attacks (16). Warfare has also been studied as a collective action problem-because individuals must mobilize to engage in a group activity with shared gains (e.g., deterrence, territory) and individual risks (e.g., injury, death) (17,18).…”
mentioning
confidence: 99%
“…A fundamental problem faced by security agencies is how to move as far as possible "left of boom" in order to detect individuals who are currently developing intent in the form of strong support for some extremist entity, even if they never end up doing anything in the real world. The importance of online connectivity in developing intent [4][5][6][7][8][9][10][11][12] has been confirmed by recent case studies of already convicted terrorists by Gill and others [6,7]. Quantifying this online dynamical development can help move beyond static watch-list identifiers such as ethnic background or immigration status.…”
Section: Introductionmentioning
confidence: 85%
“…The original power law was used to describe wars, i.e., events that caused at least 1000 casualties. Later, it turned out that the same power law also accurately describes events with fewer casualties, such as terrorist attacks; see, e.g., [2] and references therein.…”
Section: Empirical Power Law Governing Wars and Terrorist Attacks:mentioning
confidence: 99%
“…At first glance, we have a very precise description of the situation: we have a value α in an interval (2,3). This is a very crisp statement, with no uncertainty, no fuzziness.…”
Section: Let Us Apply Fuzzy Techniquesmentioning
confidence: 99%