A level is a general measure of higher and lower. While the terms “structures,” “stages,” and “waves” are sometimes loosely used to refer to “levels,” each term has their own important nuances. Any specific level has an actual structure. Levels tend to unfold in a sequence and thus progress through stages. Finally, levels are not rigidly separated from each other but are rather fluid and overlapping waves. In short, levels are abstract measures that represent fluid yet qualitatively distinct classes of recurrent patterns within developmental lines. Some examples include egocentric, ethnocentric, worldcentric, planetcentric, and Kosmocentric