Inner and outer levers
Many of the changes we need to make are big, complex, whole-of-society changes. For this to happen, they need to occur at different levels. The Theory of Deep Change identifies which changes are most effective, namely those at the assumptions and structures levels of society. This is in contrast to many current efforts, which operate more on the surface, centred on altering only the outcomes of the existing systems without changing the system itself.
The Theory of Deep Change differentiates between two types of levers that have to come together to create deep and lasting change: inner and outer levers.
The most powerful levers act at the assumption level, to change our underlying beliefs and values; nurturing the soil from which to grow a new tree. Interventions to shift these assumptions are called inner levers. While assumptions are a powerful leverage point, on a societal level they may seem very difficult to change as it requires collective shifts in assumptions from many individuals. On the other hand, this is a change everyone has the power to make for themselves, and if enough individuals do so, it is extremely powerful. Collective shifts in assumptions do happen. The perception of smoking cigarettes, for instance, has changed dramatically over time. In the past, it was widely accepted and often glamorized, associated with higher social status in many cultures, and even with health benefits. However, as scientific studies in the middle of the 20th century began to expose serious health risks like lung cancer and heart disease, attitudes shifted. This change occurred both individually and collectively, owing to public health campaigns. Today, smoking is largely seen as a harmful habit, and the number of smokers is declining almost everywhere. When people today see old ads touting the benefits of smoking, they will likely wonder how society could possibly believe in this, showing that the change in assumptions truly took place.
While the most powerful leverage points are at the assumption level, changes also need to be made at the level of structures. These changes are called outer levers, and seemingly small changes in the structures of a society can spark imagination of what is possible and change reality. One of the main places where outer levers can be pulled for structural change is in our governance systems, such as laws, tax systems or subsidies. While inner and outer levers work best in unison, it is also possible that a change in one brings about a change in the other. The shift in attitudes towards smoking would not have been as successful without the enactment of new laws at multiple levels of government, for instance, which include measures such as strict regulation of smoking in public places, bans on tobacco advertising or mandatory warning labels on products.