Before all I do hope that there would be no need for nude survival on massive scale and on longer term.But if it ever comes to us ,on massive scale and long time period, will survive those who move far away from dense populated areas.Then survival skills are only what can save individual and his family.Ancestral skills ,where is excluded anny form of help by means of technologicall gadgets as fire arms and so on are.will be crucial.Good hunting knife,axe and know how how to survive in wilderness is only what will count.If you need shelter you will make shelter,if you need Atlatl or Bow you will make it.If you decide to hunting in one area longer time you will make more permanent shelter,and so on.If ever happens colapse of civilisied way of organised life in community natural tendence after initial period in which disater happend will be aglomearting of survivors in spots where will be abundance of natural resources for many people.Life in community is only what can guarantie survival to individual and his family in fact.Because one can survive in nude nature for how long time?Danger from macro world can be at some extent handled by knowledge which one posess.But when we start reasoning microscopic world of nature,viruses and bacteria..there is no hope on longer term for individual and his family.You simply die despite all of your knowledge.We depend on medicine and pharmacy.or we must accept average life time of anscient people.I would like to hear from people what people really on realistic base think upon survival of individual or his family on longer terms of time in pure nature?Sorry for bad written English.I am from EU and my written English is kind of bad English.