What are the most important things to focus on when we seek to elicit change in a systematic, ethical manner? For an engineer, it might be patience, precision, and collaboration. For a lawyer, perhaps honesty, reasoning, and knowledge. Every discipline or domain will have a unique set of best practices or principles that speak to how to best operate. Principles are inherently abstract but they are immensely important. Let me explain. In 1937, a US Congress report introduced the concept of GDP.