wichita.edu
…build on the lower-down needs, which means that the needs on the bottom of the hierarchy must be met before you can attain those higher up. You must meet basic needs, such as food, water and shelter, before you can fully attain higher level needs like safety, friendship, confidence and achievement. It is, of course, possible to work toward higher-up…
https://www.wichita.edu/services/careteam/students/index.php