Randall Parker discusses the future of neurodegeneration and the importance of tackling this range of medical conditions to healthy life extension: "Barring advances in treatment the number of people in the world suffering dementia due to aging will more than triple by the year 2040. ... Obviously, lots of advances in medical treatments will occur in the interim. ... Brain rejuvenation combined with technologies to boost cognitive function will cause an enormous increase in average human productivity. The increases in human productivity will pay back the costs of medical research many times over. We are going to pay for the aging population one way or another. I prefer to pay for it by solving the underlying problem: reverse aging."