Energy transitions throughout history have ushered in times of dramatic change. Every day another series of breakthroughs can be found in the media. This astounding level of innovation speaks to the reality of an energy transition that is at the leading edge of a shift from our current era to the next. It also highlights the role that catalysts play in creating the future. In the energy context, the situation in Ukraine is a catalyst that likely accelerates the transition. For example, Denmark wants to build what it calls ‘Energy Islands’ to free Europe from using Russian fuel. This article describes how these islands were part of Denmark’s transition towards renewable energy, but tensions with Russia (catalyst) both expanded and accelerated their vision.