However, in the emergence of the "M-shape society", the middle class in a society gradually disappears. With the advance and consequence of globalization (for good or bad), the middle class is gradually assimilated into either side. The bulk of society is no longer the middle classes. The name is derived when you chart the class distribution a distinct M-shape is formed to denote the two extremes, with the middle class gradually shrinking and disappearing. Very few people in this middle class may be able to climb up the ladder and be able to be part of the upper class, while most from the middle class will gradually sink to the lower-income group.