I believe you are talking about the old kingdom or also known as the ancient world.
Oil
Africa's youngest country has one of the best world oil reserves. Previously, the country was part of the bigger Sudan,mainly controlled by Muslims, who impoverished the south a great deal. the christian majority south waged a war of secession, which ended up in a vote to divide the country.
<span />
Answer:
the Bible
Ultimate Source of Authority:
Lutherans believed that the Bible was the only true source of religious words and guidance.
