Here’s how each essentially functions: The emotion default: we tend to respond to feelings rather than reasons and facts. The ego default: we tend to react to anything that threatens our sense of self-worth or our position in a group hierarchy. The social default: we tend to conform to the norms of our larger social group. The inertia default: we’re habit forming and comfort seeking. We tend to resist change, and to prefer ideas, processes, and environments that are familiar.