Abdulaziz Ibn Saud, also known as Ibn Saud, was the founder of modern Saudi Arabia. Born in 1880, he united various tribes and regions of the Arabian Peninsula through military campaigns and diplomacy. In 1932, he proclaimed the establishment of the Kingdom of Saudi Arabia, becoming its first king. Ibn Saud's reign focused on modernization and development, including the discovery of oil in the late 1930s, which transformed the country's economy. He ruled until his death in 1953, leaving a legacy that shaped the political and social landscape of the region for decades to come.