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National governments now recognize online hate speech as a pernicious social problem. In the wake of political votes and terror attacks, hate incidents online and offline are known to peak in tandem. This article examines whether an association exists between both forms of hate, independent of ‘trigger’ events. Using Computational Criminology that draws on data science methods, we link police crime, census and Twitter data to establish a temporal and spatial association between online hate speech that targets race and religion, and offline racially and religiously aggravated crimes in London over an eight-month period. The findings renew our understanding of hate crime as a process, rather than as a discrete event, for the digital age.

The Report you are about to read, “Cyber Swarming: Memetic Warfare and Viral Insurgency,” represents a breakthrough case study in the capacity to identify cyber swarms and viral insurgencies in nearly real time as they are developing in plain sight. The result of an analysis of over 100 million social media comments, the authors demonstrate how the “boogaloo meme,” “a joke for some, acts as a violent meme that circulates instructions for a violent, viral insurgency for others.” Using it, like turning off the transponders on 9/11, enables the extremists to hide in plain sight, disappearing into the clutter of innocent messages, other data points. It should be of particular concern, the authors note, for the military, for whom “the meme’s emphasis on military language and culture poses a special risk.”

Because most of law enforcement and the military remain ignorant of “memetic warfare,” the authors demonstrate, extremists who employ it “possess a distinct advantage over government officials and law enforcement.” As with the 9/11 terrorists, “they already realize that they are at war. Public servants cannot afford to remain ignorant of this subject because as sites, followers, and activists grow in number, memes can reach a critical threshold and tipping point, beyond which they can suddenly saturate and mainstream across entire cultures.” This Report is at once an urgent call to recognize an emerging threat and a prescription for how to counter it. As such, it offers that rarest of opportunities: the chance to stop history from repeating itself.

This Article analyzes intermediaries’ civil liability for terror attacks under the anti-terror statutes and other doctrines in tort law. It aims to contribute to the literature in several ways. First, it outlines the way intermediaries aid terrorist activities either willingly or unwittingly. By identifying the role online intermediaries play in terrorist activities, one may lay down the first step towards creating a legal policy that would mitigate the harm caused by terrorists’ incitement over the internet. Second, this Article outlines a minimum standard of civil liability that should be imposed on intermediaries for speech made by terrorists on their platforms. Third, it highlights the contradictions between intermediaries’ policies regarding harmful content and the technologies that create personalized experiences for users, which can sometimes recommend unlawful content and connections.

Extremist exploitation of social media platforms is an important regulatory question for civil society, government, and the private sector. Extremists exploit social media for a range of reasons—from spreading hateful narratives and propaganda to financing, recruitment, and sharing operational information. Policy responses to this question fit under two headings, strategic communication and content moderation. At the center of both of these policy responses is a calculation about how best to limit audience exposure to extremist narratives and maintain the marginality of extremist views, while being conscious of rights to free expression and the appropriateness of restrictions on speech. This special issue on “Countering Extremists on Social Media: Challenges for Strategic Communication and Content Moderation” focuses on one form of strategic communication, countering violent extremism. In this editorial we discuss the background and effectiveness of this approach, and introduce five articles which develop multiple strands of research into responses and solutions to extremist exploitation of social media. We conclude by suggesting an agenda for future research on how multistakeholder initiatives to challenge extremist exploitation of social media are conceived, designed, and implemented, and the challenges these initiatives need to surmount.

Considerable time has been spent examining how groups like AQAP and ISIS used their online magazines to reach and radicalize individuals in Western democratic states. This paper continues this investigation but shifts its analysis to focus on the ‘how-to’ or instructional content of these publications, an understudied part of the literature. One of the stated goals of these magazines was to provide tactical know-how and assist supporters conducting terror plots in their home states. The question: did the tactics outlined in the magazines materialize in actual plots/attacks and how quickly were they put into practice? The paper examines this question by creating an overview of the tactics which appear in these publications and cross referencing them with a dataset of 166 Islamist-inspired homegrown terror plots/attacks in 14 Western democratic states to determine if, and when, they first appeared in relation to their publication date. It concluded that while some of the suggested strategies did appear following their publication, often it occurred after considerable time had elapsed. This suggests the instructional content did not resonate with readers in real time.

Extreme digital speech (EDS) is an emerging challenge that requires co-ordination between governments, civil society and the private sector. In this report, a range of experts on countering extremism consider the challenges that EDS presents to these stakeholders, the impact that EDS has and the responses taken by these actors to counter it. By focusing on EDS, consideration of the topic is limited to the forms of extreme speech that take place online, often on social media platforms and multimedia messaging applications such as WhatsApp and Telegram. Furthermore, by focusing on EDS rather than explicitly violent forms of extreme speech online, the report departs from a focus on violence and incorporates a broader range of issues such as hateful and dehumanising speech and the complex cultures and politics that have formed around EDS.