The article discusses how the survival of Bolivia's government, and foreign investment in the country, turns on approval of an oil and gas referendum. Last October, a popular uprising led by radical leftist groups ousted Bolivia's president, Gonzalo S& aacute; nchez de Lozada, at a cost of 59 dead. The vice-president, Carlos Mesa, took over the top job, and is trying to steer a disgruntled country riven by ethnic tension until the next election in 2007. In a referendum, Bolivians will be asked what they want to do with their oil and gas wealth--the issue that served as a catalyst for protest last October. Bolivia is the poorest country in South America. But thanks to foreign investment in exploration, it now has the continent's second-largest gas reserves outside Venezuela. The radicals who led last October's protests want to renationalise the oil and gas industry, largely privatised by Mr Sánchez de Lozada in an earlier term in the mid-1990s. If the referendum is defeated and Mr Mesa falls, renationalisation of the industry might follow. Approval would be a less bad outcome. But already, uncertainty has caused foreign investment in Bolivia to plunge.