22. The non-transitory computer readable medium of claim 21 , wherein the instructions further comprise: receiving a request to broadcast the first message; in response to identifying the previously broadcasted second message: linking the second message with the first message, and removing the second message from an original location in the reverse chronological stream of messages, wherein the original location corresponds to an original broadcast time of the second message.
21. A non-transitory computer readable medium comprising a plurality of instructions for identifying a relevant conversation, the plurality of instructions, when executed by a computer processor, comprising functionality to: 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.