How healthy will the world be in 2040? If things continue as they are now, the answer is better off than we are today: Life expectancy will be, on average, 4.4 years higher for both women and men around the globe by 2040. That’s according to a new report, published in the journal The Lancet. But public health choices and policy decisions that we make — or fail to make — now could set us down various paths, the worst of which could see decreased life expectancy in nearly half the world’s countries, the authors reported. In the report, the researchers created a model projecting the health outcomes and major causes of death for the year 2040 in 195 countries and territories. The model was based on a previous study that looked at such factors in global populations between 1990 and 2016.