The global oil industry for much of the 20th century was controlled by a powerful cartel of private companies known as the "Seven Sisters." This group long dominated production, pricing ...

In the latter half of the 20th century, the global oil market was dominated by a group of multinational, Anglo-American companies known as the ‘Seven Sisters’. And so in hopes of exerting more ...

In the latter half of the 20th century, the global oil market was dominated by a group of multinational, Anglo-American companies known as the ‘Seven Sisters’. And so in hopes of exerting more ...