Final answer:
Thorstein Belen recognized that beauty's perception has been shaped by historical contexts and philosophies, such as those from Plato, Kant, and aesthetic principles developed during different eras, including ancient Greek and Roman times, which emphasized proportion and balance in defining beauty.
Step-by-step explanation:
Thorstein Belen observed that much of beauty was influenced by various factors throughout history. In ancient times, philosophers like Plato believed that beauty had an objective form, related to harmony, proportion, and balance, and transcended mere sensory or emotional response. During different historical periods, such as in 6.68 Bamboo River era, beauty was integral to social status, as seen in the elaborate personal adornments of the aristocrats, signaling their virtue.
Immanuel Kant emphasized that beauty is a subjective judgment with a common human component suggesting that people share an inherent sense of what's beautiful. Meanwhile, the Greeks had their standards, including the valuing of blonde hair and harmonious facial features. The aesthetics of beauty is not only about physical traits but also includes an aesthetic experience, often elicited by man-made or natural wonders, and this is studied in the field of aesthetics.
The concept of a beauty canon, a standard that artists have aimed to emulate since ancient Egyptian times, evolved further with the Greeks and Romans and carried forward into the Renaissance and beyond. Here, the proportionality of features played a significant role in defining beauty, paralleling Polykleitos's and Galen's observations of beauty being dependent on ratios and proportions of body parts.