It also said that a majority of the new middle class will live in cities by 2030, with most of them connected by technology, being protected by advanced care.
The study analysed about where the current trends will take the world in the next 15 to 20 years, thus helping policymakers plan for the best and worst possible futures to come.
While the world may see a decline in poverty levels, it is estimated that food, water and energy will be scarce.
'Nearly half of the world's population will live in areas experiencing severe water stress,' it said. Africa, the Middle East, China and India, will be at risk of food and water shortages.
At the same time, the report warns of catastrophic effect of possible 'Black Swans,' extraordinary events that can change the course of history. These include a severe pandemic and more rapid climate change that could make it hard to feed the world's population.
