As a concept of "the ethic of reciprocity," it has its roots in a wide range of world cultures, and is a standard way that different cultures use to resolve conflicts. [1] [5] It has a long history, and a great number of prominent religious figures and philosophers have restated its reciprocal, "two-way" nature in various ways (not limited to the above forms). [1]
This is the first time I looked for an outside source to confirm my conclusion that the Golden Rule was a from of reciprocity, but I found it. The above exerpt was in the context of discussing that rule. My paste doesn't work well in firefox, so once I paste, that's it.