Final answer:
Radical Islamism, as defined by Bassam Tibi, is characterized by three core traits: adherence to Political Islam, a firm Opposition to secularism, and the Use of violence as a means of pursuing their goals.
Step-by-step explanation:
According to Bassam Tibi, the three characteristics of Radical Islamism are Political Islam, Opposition to secularism, and the Use of violence. Radical Islamism is a strand within Islamic fundamentalist thought that seeks to implement Islamic principles and law (Sharia) in society and politics. It is often opposed to democratic reforms, women's equality, and social freedoms promoted by democratic reformers. Instead, these radical groups uphold a rigid interpretation of Islam and are known for opposing Western influences and secular governments. The use of violence is a characteristic tactic employed by such groups to achieve their ideological goals, as seen in acts of terrorism by organizations like al-Qaeda and ISIS.