David Koch obituary

US businessman, free marketeer and rightwing activistDavid Koch, who has died aged 79, was ranked as the eleventh richest person in the world. Alongside his older brother Charles, he built his family’s company into one of the US’s biggest conglomerates and each brother’s share was estimated to be worth more than $50bn. They used their fortunes to influence American politics in a rightward direction following their libertarian ideology.Charles wanted to “minimise the role