Final answer:
Social classes in our society today are more fluid and can be based on factors like education, occupation, and income. In the past, social classes were largely determined by factors like wealth, land ownership, and birthright.
Step-by-step explanation:
In our society today, the idea of social classes is different from how it was in the past. Previously, social classes were largely determined by factors like wealth, land ownership, and birthright. For example, in Europe's Middle Ages, social classes were defined by the feudal structure and land ownership. But today, social classes are more fluid and can be based on factors like education, occupation, and income. Additionally, slavery, which was a form of social class in the past, no longer exists in most societies.