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A better understanding of how support evolves online for undesirable behaviors such as extremism and hate, could help mitigate future harms. Here we show how the highly irregular growth curves of groups supporting two high-profile extremism movements, can be accurately described if we generalize existing gelation models to account for the facts that the number of potential recruits is timedependent and humans are heterogeneous. This leads to a novel generalized Burgers equation that describes these groups’ temporal evolution, and predicts a critical influx rate for potential recruits beyond which such groups will not form. Our findings offer a new approach to managing undesirable groups online – and more broadly, managing the sudden appearance and growth of large macroscopic aggregates in a complex system – by manipulating their onset and engineering their growth curves.

A popular stereotype is that women will play more minor roles than men as environments become more dangerous and aggressive. Our analysis of new longitudinal data sets from offline and online operational networks [for example, ISIS (Islamic State)] shows that although men dominate numerically, women emerge with superior network connectivity that can benefit the underlying system’s robustness and survival. Our observations suggest new female-centric approaches that could be used to affect such networks. They also raise questions about how individual contributions in high-pressure systems are evaluated.

The Workers’ Party of Social Justice (DSSS) is the strongest right-wing extremist party in the Czech Republic with about two percent of votes in the last parliamentary election. It profiles itself as the »defender of ordinary people« against »the corrupt political elite«, especially the parties in power, and tries to make use of government corruption scandals to discredit the democratic political spectrum as a whole.

The main strategy to raise support for the extreme right is to highlight criminal cases comprising members of the Roma population: »Anti-gypsyism«, where a number of local citizens who are not among the party’s main support take part in various protest events focused on Roma criminality, is becoming the main area of contact of DSSS with mainstream forces.

Despite its poor showing in elections, the extreme right in Czech Republic attained a certain degree of influence due to media coverage of its activities. Mainstream political parties respond to it and often borrow its anti-gypsy rhetoric, while neither the state nor the non-governmental sector has proven to be very effective in solving the so-called Roma issue.

As the debate on whether Hamas should be designated a terrorist organization intensifies across Europe and North America, policymakers and practitioners seek to identify the core principles that unify the group and its ideology. This paper contributes to this discussion by examining how Hamas uses Twitter to frame its narrative to English-speakers around the world. From March 2015 until November 2019, when its account was suspended from Twitter, Hamas operated an English-language Twitter handle under the name @HamasInfoEn. Using thematic content analysis to explore the first 2,848 tweets sent by Hamas in English—between March 2015 and March 2018—this paper explores the socio-political and religious narratives that lay at the core of Hamas’s online public diplomacy throughout its first three years on Twitter. Since its entrance into politics in 2006, some academics argue that Hamas has increasingly sought to distance itself from acts of terrorism and legitimize its actions as a governing actor, thereby seeking to carve out a place for itself in the international community. This study presents a nuanced understanding of how Hamas represents itself internationally, to better understand where the group is going, and how to best counter its narratives.

In the process of shifting far-right ideas from the fringes to the centre of the political spectrum, the alt-right has infiltrated online spaces to mainstream extremist ideas. As part of this process, female alt-right influencers have emerged within various popular social media platforms and fringe outlets, seeking to build credibility for the movement with new audiences. Contrary to previous assumptions about women as harmless adherents of far-right ideology, alt-right women are emerging as “organic intellectuals”, influential in the formation of everyday beliefs and principles in congruence with the tenets of far-right ideology. Their narratives strategically weave far-right ideological discourses, such as the imminent crisis of white identity, with topical matters on lifestyle and well-being. This article examines the rhetoric of online influencers as they shape an ideological space which is contributing to the normalization or mainstreaming of far-right ideas. In doing so, it addresses two questions: How do alt-right female influencers narrate a far-right identity? How do they mainstream white supremacist ideas online? Drawing on new empirical material from a series of far-right podcasts, this article demonstrates that alt-right women strategically construct a “liberated” female identity rooted in femininity, traditionalism and gender complementarity, and problematize feminism and women’s emancipation as constitutive of the crisis facing the white race. It further identifies the presence of an elaborate cultural narrative around white victimhood which alt-right influencers use to mainstream their ideology. To counter the perpetuation of far-right ideas in society, women’s participation in shaping far-right ideology should not remain unaddressed. This article sheds some light on how a small but highly visible group of influencers are actively working to promote a dangerous far-right ideology.