The path that some individuals take to a point at which they may be willing to kill others and themselves in the name of Islam is today’s most pressing security concern. It is a journey that is still too poorly understood despite dozens of theoretical models and profile studies. What is clear is that there is no such thing as a typical terrorist, and no such thing as a typical journey into terrorism. The journey into terrorism is often described as a process of ‘radicalisation’. However, to be a radical is to reject the status quo, but not necessarily in a violent or even problematic manner. The process of radicalisation is obviously a problem when it leads to violence, and most obviously to al-Qaeda inspired terrorism. But the last decade in particular has also seen a growth in many types of nonviolent radicalisation. A successful counter-terrorism strategy must be based on a clear understanding of these distinct forms of radicalisation….