— Hun­dreds of com­pa­nies and sci­ence labs around the globe are research­ing the inner work­ings of the human brain and mind, and devel­op­ing new ways to help brain own­ers be smarter, sharp­er, and health­i­er for longer. What explains this flur­ry of activity? To answer that ques­tion, let us high­light four key dri­vers dis­cussed in depth at…