In frustration of Mongoid::Versioning, I created this plugin for tracking historical changes for any document, including embedded ones. It achieves this by storing all history tracks in a single collection that you define. (See Usage for more details) Embedded documents are referenced by storing an association path, which is an array of document_name and document_id fields starting from the top most parent document and down to the embedded document that should track history. This plugin implements multi-user undo, which allows users to undo any history change in any order. Undoing a document also creates a new history track. This is great for auditing and preventing vandalism, but it is probably not suitable for use cases such as a wiki.