The Croquet project is an effort to develop a new open source computer operating system built from the ground up to enable deep collaboration between teams of users. To do this, the project seeks to define and develop a system is focused on the simulation and communication of complex ideas. We call this “communication enhancement” – the direct extension of the abilities of humans to develop, understand, and describe even the most complex simulations. Croquet enables this communication by acting as the equivalent of a broadband conferencing system built on top of a 3D user interface and a peer-to-peer network architecture.