The title pretty much sums it up: a walk with Nelson from rural boyhood to his election as South Africa’s first democratically-elected president. Much of the journey is taken up with his early fight against apartheid and the subsequent 22 years in jail. To anyone who hasn’t read the autobiography on which the film is based, this will provide interesting details about his personal life and political struggles. Although Idris Elba (Mandela) and Naomie Harris (his wife Winnie) both create rich characters and the narrative is compelling, the whole thing lacks emotional power. The prison years are the most absorbing. It should take 2+ hours to chronicle a great man’s life, but it feels too long and sometimes too simplistic. Still, an informative history lesson.