1. A method for displaying a relevant conversation, comprising: identifying a conversation graph identifying messages broadcasted by a plurality of authoring accounts; selecting a subset of messages of the conversation graph for inclusion in a relevant conversation; adding, by a computer processor, a first message of the relevant conversation to a reverse chronological stream of messages associated with a recipient account; identifying, by the computer processor, a previously broadcasted second message of the relevant conversation, wherein the second message is an ancestor of the first message in a branch of the conversation graph; and providing at least a portion of the stream of messages for display on a client device, wherein the client device displays, concurrently with the first message in the stream of messages, an indication of the second message and a display element indicating that the second message is the ancestor of the first message.
2. The method of claim 1 , further comprising: detecting a user selection of the display element; and identifying a set of messages between the first message and the second message in the branch of the relevant conversation, wherein the client device expands a portion of the stream comprising the display element to display the set of messages.