You can read the UN's Declaration of Human rights at
www.un.org/Overview/rights.html
Although many dismiss the views the UN as just, again, the US- they have been wrestling with the question for over 50 years,crafting articles seeking a universal definition.
Article 3: Everyone has the right to life, liberty and security of person.
As Griff points out, the newly sanctioned US military courts need to be addressed here too- it all goes fuzzy and out of focus in the name of war.
