Which historical stages of Korean society did North Korean academia recognize in the 1960s?

In the 1960s, North Korean academia recognized five historical stages of Korean society. These stages are:

1. Primitive Communal Stage: This is the earliest stage of human society, characterized by communal living and a lack of private property or class divisions.

2. Slave-owning Stage: This stage is marked by the emergence of private property and the division of society into classes, with a ruling class of slave owners and a lower class of slaves.

3. Feudal Stage: In this stage, the ruling class is made up of feudal lords who own land and the lower class is made up of serfs who work the land.

4. Capitalist Stage: This stage is characterized by the rise of capitalism, with a ruling class of capitalists who own the means of production and a working class who sell their labor.

5. Socialist Stage: In this final stage, the means of production are owned collectively and society is organized around the principle of "from each according to his ability, to each according to his needs."

These stages reflect the Marxist-Leninist understanding of history, which was the dominant ideology in North Korea during the 1960s.