The continual adoption of new fashions among the many styles of available clothing is similar to Darwin's theory of natural selection. The driving force for fashion change is the need for social groups to express their unique identity through clothing, which fostered the rise of the fashion industry in the Industrial Age. Fashion culture has always been defined by change, its constant search for the newest design, which gives it a formal similarity with other systems that rely on continuous innovation (Purdy 1). Clothing, and more generally, style, can be important non-verbal representations of an individual's status in society.