Humans and every other life form are physically thermodynamic engines subject to the constructor law, applicable to anything that flows. (Everything flows!!)
This physics law is so cool it does not only apply to real things, but also to abstract things like our society. Anything that is a process is subject to this law. My translation of this law is: any portion of a a flow needs to optimize for the next portion coming
In this book the author will use the scenario of draining an area via a point