Absolute constrains
- Break throughs in fundamental science
- Level of human population
- Size of geographical mass under occupation - currently Earth
Transient constrains
- monetary and credit supply levels
inflation
- deflation
- proliferation of scientific techniques
full proliferation results in zero or negative ROI when further credit is employed
- ease of population, trade and credit/money flows around the world
Related references
- [*Why the west rules for now*, Ian Morris](https://garyteh.com/2018/02/book-summary-why-the-west-rules-for-now/)
- [*Understanding big debt crisis*, Ray Dalio](https://garyteh.com/2019/09/book-summary-understanding-big-debt-crisis-by-ray-dalio/)
- [*The wealth of nations*, Adam Smith](https://garyteh.com/2019/06/the-book-summary-wealth-of-nations/)
- [*Assets classes under various macro economic environments*, Gary Teh](https://garyteh.com/2019/10/thoughts-of-various-asset-class-type-and-their-usage/)
- [*Manias, Panics and Crashes*, Charles Kindlenerger and Robert Aliber](https://garyteh.com/2019/07/manias-panics-and-crashes-balance-of-trade-mechanism/)