Divine immanence & the binding of a people

Shamil, Part II: overcoming tribalism through fanaticism

They were all caught up in the need of their race to renew its scattered inheritance, to cross and mingle and infuse their bloodlines in a great new pooling of genes. And the race knew only one sure way for this - the ancient way, the tried and certain way that rolled over everything in its path: jihad.

— Frank Herbert, Dune