From a historical perspective Hinduism preceded both Islam and Islamism.

Islam had a golden age. Islamism has never had a golden age.

Primarily Christianity and Islamism

Islamism is not a religion; it is a political ideology whose goal is to bring the religious tenets of Islam into the daily functioning of a government and its laws. Islamism is a modern movement whose roots began contemporaneously with the rise of Salafism in the late 1800s and early 1900s in Egypt. Most of the Islamist leadership is by nature quite religious. Some of the biggest leaders and founders of Islamism include Sayyed Qutb, Al-Maududi, and Hassan al-Banna.

Yes. Islam is a religion. Islamism, however, is something else. It is a political ideology whose goal is to bring the religious tenets of Islam into the daily functioning of a government and its laws. Islamism is a modern movement whose roots began contemporaneously with the rise of Salafism in the late 1800s and early 1900s in Egypt. Islamism is not by nature violent or expansive. Many Islamist movements have concrete nationalistic goals such as the Islamists in power in Turkey.