Creating a carbon-neutral, sustainable society requires revolutionary social innovations. The previous chapters of this book have attempted to present what kind of social innovation is needed and what methodologies are necessary to create a carbon-neutral and sustainable society based on the specialized perspectives of different humanities and social science disciplines. The final chapter shows the social innovations necessary to realize a carbon-neutral society, which were concluded from discussions in diverse social science fields, and the transition stages (first to third steps) to achieve a carbon-neutral society. However, research into the various synergies and trade-off effects that occur during a simultaneous resolution of multiple issues is a key future task.