 According to Bear Grylls, masculinity is in crisis, and he is interested to see if men can survive stripped of the luxuries of 21st century living, and the show is therefore also a social experiment to see if man can recapture his primeval instincts.In the second series, following complaints about the absence of women in the first series, two groups, 14 men and 14 women, were left on two separate islands.In the third series, two groups of eight men and eight women were left at opposite ends of the same island, with neither group knowing of the other's presence.