It's a foundation - it's easiest to illustrate the patterns I'm describing on a molecular/cellular level, but they apply across the board. My current intent for the actual series is to start with a group of posts on molecular/cellular systems, both because a basic understanding of genetics and metabolism is extremely useful to understanding everything else, and because it's the area I'm most familiar with.

However, recognizing that about half the interest expressed in the suggestions thread was for topics above the molecular level, I'm trying to figure out how to do some posts on them earlier without making things disjointed/difficult to follow. I might settle for weaving in short bits about how molecular topics will apply to macroscale ones later.