What with a growing climate crisis and increasing uncertainty over the future of fossil fuels, it can be no surprise that the question “what’s the alternative to current energy systems?” is in the air. And there has been no shortage of answers competing for space and attention. In energy policy today, the main conflict is not between business as usual and “The Alternative”, but among the different proposed alternatives themselves. How are these alternatives to be evaluated against each other? The suggested solutions are diverse. The questions being asked are also different, as are the criteria for answering them, the vocabularies in which they are expressed, and the politics with which they are associated. The point of this introduction to the energy transitions issue is not to simplify this debate but to clarify how complex it is. What is on the table in the discussion? Is there a place for everyone there? If so, how will the discussion proceed?