PoliticsOPINION: Saudi oil price war poses a danger to ruling familyThe Saudis have started an oil price war they can ill afford at a time of falling finances and worsening divisions within the ruling Al Saud familyDangerous game: Saudi Arabia's Crown Prince Mohammed bin Salman attends a meeting with Russian President Vladimir Putin in Riyadh, Saudi Arabia, in OctoberPhoto: REUTERS/SCANPIXNassir ShirkhaniLondon