Global ageing, in developed and developing countries alike, will dramatically alter the way that societies and economies work. The issues include how individuals find fulfilment, at what age they retire, and their quality of life once they do retire; how governments devise social contracts to provide financial security; how the older and younger generations interact as they divide up the economic pie; how businesses staff their jobs to compensate in many countries for shrinking workforces; and how health systems respond to the altered needs of those living longer.