1. A method of monitoring an emotional state of a conversation, the method comprising: monitoring, by an information handling system comprising a processor and a memory, a communication between a first person and a second person to determine an emotional state of the communication by analyzing textual content in the communication for emotion content using a semantic model to evaluate valence and arousal emotion measurements for the textual content; transforming, by the information handling system, the valence and arousal emotion measurements by projecting the valence and arousal measurements onto a two-dimensional emotional vector and then computing a one-dimensional vector angle to represent the emotional state of the communication; providing, by the information handling system, a visual representation of the emotional state of the communication that is derived from the one-dimensional vector angle for display to a person having access to the communication; and performing an intervention action to improve the emotional state of the communication in response to detecting the emotional state of the communication meets one or more specified intervention criteria.