Arab oil embargoes, nationalisation of oil production in the Persian Gulf and the arrival of buccaneering trading houses such as Glencore, Vitol and Trafigura saw the Sisters lose their sway.

阿拉伯石油禁运、波斯湾石油生产国有化以及嘉能可、维多和托克等海盗贸易公司的到来，导致姐妹党失去了影响力。