1. A discussion-topic server configured to manage communications and content sharing between a first device and at least one second device, wherein the discussion-topic server is configured to communicate over a data communications network with the first device and the at least one second device, the discussion-topic server comprising: at least one network interface connected to the data communications network and configured to receive and transmit data; and at least one processor adapted with machine-readable instructions that configure the discussion-topic server to: receive, from the first device, first input naming a first discussion topic and identifying the first discussion topic as a parent discussion topic; receive, from the first device, second input naming a second discussion topic and identifying the second discussion topic as a sub-discussion topic of the first discussion topic; receive a plurality of discussion content identified to be associated with one or both of the first discussion topic and the second discussion topic; associate first discussion content, of the plurality of discussion content, that is identified to be associated with the first discussion topic with a first discussion data structure created for the first discussion topic; associate second discussion content, of the plurality of discussion content, that is identified to be associated with the second discussion topic with a second discussion data structure created for the second discussion topic; enter in a relational data structure at least one entry identifying the second discussion data structure as being related hierarchically as a sub-topic to the first discussion data structure; and responsive to receiving from the first device a request that identifies the second discussion topic for display, transmit first visual feed data comprising the second discussion content to the first device for displaying on the display of the first device a first visual feed comprising a full-screen listing of at least a portion of the second discussion content.