Why did the central interior of Arabia remain largely independent during Ottoman and British influence?

The central interior of Arabia, particularly the Najd region, remained largely independent of Ottoman and British influence due to its challenging geography and the rise of powerful local political and religious movements.

The region is characterized by a rugged, arid plateau bounded by vast sand deserts, such as the Rubʿ al-Khali, which made it difficult for external powers to project and maintain authority. While the Ottoman Empire maintained a presence in the Hejaz for religious prestige and control over the Holy Cities, their power was largely limited to urban garrisons and pilgrim routes, often relying on subsidies and bribes to manage local tribes rather than direct governance.12

In the mid-18th century, the rise of the Wahhābī movement and the Āl Saʿūd dynasty provided a unified political and ideological force that consolidated the interior. This movement actively resisted external encroachment, leading to conflicts with the Ottomans and their proxies. By the early 20th century, Ibn Saud successfully unified these territories, establishing the modern Saudi Arabia and maintaining sovereignty over the interior while coastal regions faced more direct British commercial and political influence.1345