- 改变世界的前提是理解世界 --> Foundational undestanding
- three world model
- the interplay of matter, energy, & information
- 微观：如何改变一个人的行为 (information & knowledge)
- education
- social media
- 中观：如何引领一群人的行为
- management
- 宏观：如何介入复杂系统的行为
- understanding systems
- system leverage points