A brick wall built in the shape of a wave (arch) can support itself with a single layer of bricks. A straight wall needs two or more layers of bricks to remain structurally sound. The wave technique was superior for employing fewer bricks to build a wall that connected the same points as a straight-line brick wall.

How might we deploy our resources to maximize our intended impact? A straight line is easy to visualize but may not be our best use of resources.