The period between the old configuration and the new one is when the most change is possible and when most actors are too cautious to attempt it.
What the Interregnum Is
The interregnum is the period between the end of the old institutional configuration and the establishment of the new one. It is the gap between the departure of the outgoing leadership and the consolidation of incoming authority, between the end of the old strategic framework and the establishment of the new one, between the dissolution of the old coalition structure and the formation of the new one. It is characterised by reduced enforcement of existing norms — the people who enforced them have departed or are distracted by the transition — and by genuine uncertainty about which norms the new configuration will establish.
This reduced enforcement and genuine uncertainty create a window of institutional plasticity that does not exist in stable periods. Actions that would have been blocked by the prior configuration's enforcement capacity are possible during the interregnum. Proposals that would have been rejected by the prior configuration's settled preferences are open for reconsideration. Relationships that would have been impossible to build across prior configuration lines are available to be built in the fluid moment when those lines are not yet clearly drawn.
Why Most Actors Do Not Use It
Most institutional actors respond to the interregnum with caution rather than action. The uncertainty that creates the opportunity is also experienced as risk — the absence of clear authority means the absence of clear protection, and the actor who moves during the interregnum cannot be certain that the incoming configuration will validate the moves they have made. The rational response to this uncertainty, for most actors, is to wait: to observe the incoming configuration's priorities and preferences before committing to positions that might conflict with them.
This cautious majority creates the opportunity for the actor who is willing to move with incomplete information. The interregnum window closes when the incoming configuration consolidates — typically within months of the transition's official completion. The actor who has moved during the window, and whose moves have been consistent with the incoming configuration's priorities, has established a position that the cautious majority is then negotiating to achieve from a standing start.
The Risk Calibration
Using the interregnum opportunity requires calibrating the risk that the moves made during it will be invalidated by the incoming configuration. This calibration requires genuine intelligence about the incoming configuration's likely priorities — intelligence gathered during the pre-official period by reading the transition signals. The actor who has accurately read the transition direction and moves consistently with it during the interregnum has taken a calculated risk. The actor who moves during the interregnum without this intelligence has taken an uncalculated one.
The interregnum is the moment when the institution is most changeable and most actors are least willing to attempt change. The gap between those two facts is the opportunity — available to the actor who has done the reading and has the nerve to act before the reading is confirmed.
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