Slovenian government has started working with EIT Climate-KIC on the Deep Demonstration of a Circular, Regenerative and Low-Carbon Economy in Slovenia to develop pathways for a more radical transition to climate neutrality through a circular economy, using a systems innovation approach. This partnership aims to catalyse rapid decarbonisation and drive climate action and resilience through circular economy approaches while having a prosperous society. The Deep Demonstration methodology was deliberately chosen due to the complexity associated with transforming whole systems (not only technical but also social systems) and at the pace, the transformation needs to happen. This pace stems from the fact that achieving net-zero greenhouse gas emissions by 2050 requires rapid critical structural and exponential changes on multiple fronts simultaneously.