David Koch is dead: one of the richest men in the world

Among his interests were also philanthropic causes, to which he gave a billion dollars.

Liberal on issues such as abortion and gay marriage, David Koch has used his fortune to support conservative causes, such as lowering rates and deregulation.

The Koch brothers have always been known for their influence on American politics. Although they did not support the candidacy of Donald Trump in 2016, its political network – whose influence is considered inferior to that of the Republican party – praised the administration's efforts for deregulation. But they criticized Trump's policies on trade and immigration.