Many Bolivian presidents have been idiots. Let´s see what Lonely Planet´s Bolivia has to say about one of them, the "bizarre, cruel General Mariano Melgarejo, who ruled from 1865 to 1871...":

"Melgarejo is ... credited with a host of .... gaffes, including murdering a penitent conspirator, appropriating Indian lands..., ceding territory to Brazil in exchange for a horse, and tying the British ambassador naked to the back of a mule and banishing him for failing to drink enough beer. This last infringement, which was the last straw for Queen Victoria, led her to declare that Bolivia did not exist and that it would thenceforth not appear on British maps."