The document discusses the philosophy behind Archives 2.0 and Web 2.0, which is based on mankind's desire to interact and collaborate with others and information by trusting users as co-developers. It provides examples of how this philosophy has existed throughout history, from handwritten letters to modern tools like wikis, blogs, and social networks. The document also gives examples of Archives 2.0 projects using social software like wikis, blogs and tagging to allow user contributions.