The nature of caste in India has been a subject of extensive sociological and anthropological debate. While it is undeniably a system that stratifies society, some scholars, most notably Louis Dumont, argue that caste is fundamentally a system of hierarchy rather than social stratification in the Western sense. This distinction emphasizes the unique ideological and structural characteristics of caste.

Understanding Social Stratification: Social stratification generally refers to the division of society into layers or strata based on factors like wealth, power, and prestige. These systems can be open (allowing for social mobility, like class systems) or closed (like slavery or estates). The key elements are unequal distribution of resources and status, and the formation of distinct social groups.

Caste as a System of Hierarchy (Dumont's Perspective): Louis Dumont, in his seminal work Homo Hierarchicus, argued that caste is not merely a form of social stratification but a unique system of hierarchy based on the opposition of the pure and the impure. His central arguments are:

1. Ideological Basis: Caste is primarily an ideological system rooted in religious beliefs, particularly Hinduism, where ritual purity and pollution are paramount. This ideological foundation distinguishes it from class, which is largely economic.
2. Holistic Nature: The hierarchy of caste permeates all aspects of life – social, religious, economic, and political – rather than being confined to specific domains. It defines one's status, occupation, marriage partners, and social interactions.
3. Ascribed Status: Status in the caste system is ascribed at birth and is immutable. There is virtually no individual social mobility between castes, unlike in class systems where individuals can move up or down based on achievement.
4. Graded Inequality: The hierarchy is not just about layers but a meticulously graded system of inequality, where each caste occupies a specific rank based on its ritual purity. The Brahmin (priestly caste) is at the top due to their ritual purity, and the Dalits (formerly 'untouchables') are at the bottom due to their association with pollution.
5. Separation of Status and Power: Dumont argued that in the caste system, ritual status (purity) is separated from temporal power (political and economic). The Brahmins hold the highest ritual status, while the Kshatriyas (warriors/rulers) hold political power, and Vaishyas (merchants) hold economic power. This separation is crucial to maintaining the hierarchical order.
6. Endogamy: Marriage is strictly confined within one's own caste, reinforcing the boundaries and perpetuating the system across generations.

Why it's argued not to be 'social stratification' in the Western sense: Proponents of this view suggest that 'social stratification' often implies a system where economic factors are primary, and some degree of mobility is possible. Caste, with its rigid, birth-based, ritualistic, and ideologically driven nature, is seen as fundamentally different. It's a system of graded inequality where the entire society is ordered according to a sacred principle, rather than just being divided into economic or power-based layers.

Counter-arguments (Why it is a form of stratification): Despite Dumont's influential perspective, many sociologists argue that caste is a form of social stratification because it clearly divides society into distinct groups with unequal access to resources, power, and prestige. The fact that it's a closed system based on ascription doesn't negate its stratifying function. It creates a hierarchy of power and privilege, even if the basis of that hierarchy is ritual rather than purely economic. Modern studies also highlight the economic and political dimensions of caste, showing how it functions as a system of exploitation and resource control.

Conclusion: While caste undoubtedly stratifies society, Dumont's argument highlights its unique hierarchical structure, rooted in ritual purity and pollution, which distinguishes it from class-based stratification. It emphasizes the ideological and holistic nature of caste, where status is ascribed and immutable. However, it's also important to acknowledge that caste, in practice, has always involved significant economic and political inequalities, making it a complex system that functions both as a ritual hierarchy and a form of social stratification.