At which of its Session, did the Congress officially accept, the ‘socialistic pattern of society'?

The Indian National Congress officially adopted the 'socialistic pattern of society' as its primary goal during the 60th Session held at Avadi, Madras, in January 1955 [t2][t5]. This historic resolution, often referred to as the Avadi Resolution, marked a significant shift in the party's economic policy, moving beyond the concept of a mere Welfare State to a more structured socialist framework [t6][t8]. While the Congress had discussed egalitarian ideals since the 1931 Karachi Session, the 1955 declaration was the first time it was formally codified as the party's objective [t4][t5]. This decision influenced the formulation of the Second Five-Year Plan, emphasizing national income growth and equitable distribution [t6]. The adoption of this goal created a political dilemma for the existing Socialist Party, as the Congress had now co-opted their core ideological platform [c1].

Sources

1. [1] http://etd.lib.jnu.ac.in/TH544.pdf
2. [2] Politics in India since Independence, Textbook in political science for Class XII (NCERT 2025 ed.) > Chapter 2: Era of One-party Dominance > Communist victory in Kerala > p. 34