Describe the economy of Arabia

The economy of Saudi Arabia is one of the top twenty economies in the world, and the largest economy in the Arab world and the Middle East. ... The country has the second-largest proven petroleum reserves, and is the largest exporter of petroleum in the world

The country has the second-largest proven petroleum reserves, and is the largest exporter of petroleum in the world. It also has the fifth-largest proven natural gas reserves and is considered an "Energy Superpower". The economy of Saudi Arabia is heavily dependent on oil, and is a member of OPEC.

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor: