  Our daily human life is filled with a myriad of joint action moments, be it
children playing, adults working together (i.e., team sports), or strangers
navigating through a crowd. Joint action brings individuals (and embodiment of
their emotions) together, in space and in time. Yet little is known about how
individual emotions propagate through embodied presence in a group, and how
joint action changes individual emotion. In fact, the multi-agent component is
largely missing from neuroscience-based approaches to emotion, and reversely
joint action research has not found a way yet to include emotion as one of the
key parameters to model socio-motor interaction. In this review, we first
identify the gap and then stockpile evidence showing strong entanglement
between emotion and acting together from various branches of sciences. We
propose an integrative approach to bridge the gap, highlight five research
avenues to do so in behavioral neuroscience and digital sciences, and address
some of the key challenges in the area faced by modern societies.
