Hate Speech and Radicalisation in the Network, published by the Online Civil Courage Initiative (OCCI), a programme of ISD and Facebook, brings together a variety of interdisciplinary perspectives to explore the prevalence of hate speech on social media, the strategies and tactics of Islamist and far-right extremist groups online, the potential impact of disinformation on political polarisation and radicalisation, and how government, the private sector and civil society can respond to these challenges.