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Around 12,000 years ago, two developments began to revolutionise the way human society was organised: the cultivation of plants (agriculture) and the domestication of animals. These meant that people no longer had to live from hand to mouth, hunting and gathering foodstuffs, but had the potential to produce over and above their immediate needs. This in turn led to the development of private ownership of the means of producing wealth, the division of society into classes of exploiters and exploited, and a state apparatus to maintain the economic control of the ruling class.
The Neolithic revolution
These two achievements - the cultivation of plants (agriculture) and the domestication of animals – are now described as the ‘Neolithic revolution’. They enabled humans to gain a degree of control over their environment for the first time. The productivity of labour increased enormously: instead of travelling to where they could find adequate food at different times of the year, humans were no longer completely dependent on natural conditions.
This happened first in the ‘Fertile Crescent’ of the modern-day Middle East but also arose subsequently around the world, in places such as China, the Indus valley, Papua New Guinea and different parts of Africa and the Americas.
More permanent settlements were established, where reserves of food could be stored and crops and animals cared for and protected against raids. For the first time, human society was able to consistently produce and store a permanent surplus – food and goods produced over and above what was needed to survive.
This allowed a section of society to be released from the day-to-day work of producing the necessities of life without endangering the survival of the group. That section could then concentrate on specialist tasks, which ranged from conducting rituals believed to help bring food and fortune to the group, to toolmaking and the development of new techniques such as the smelting of metal and firing of pottery.
This led to new and more productive ways of using human labour, for example by the use of metal tools in agriculture. As the productivity of labour increased, the size of the permanent surplus also increased. Societies became more complex, with a consequence being that a layer of administrators emerged.
The development of Sumerian society, which arose between the Tigris and Euphrates rivers not far from modern-day Baghdad, was based on irrigation: human-made systems of channels to take river and rainwater to fields of crops. This massively increased the crop yields. But to organise the work of digging and maintaining irrigation channels to support a large and growing population, Sumerian society needed administrators and record keepers.
They developed the first known writing system in the years leading up to 3,000 BCE, in the form of symbols scratched into clay tablets to record simple transactions like the number of sheep, or amount of grain. Over several hundred years, as the tasks of the administrators grew and became more complex, those early symbols were developed into a more advanced system of writing understood by all Sumerian administrators, with the ability to write and read being a closely guarded privilege.
The rise of class society
The specialists and administrators who were freed from the work of producing the necessities of life played a progressive role in helping to develop the productive forces. But the development of a permanent surplus also raised the question of what to do with it, and who should decide?
There were countless battles over this. However, over a long period of time, many specialists and their descendants became entrenched in their positions through the accumulation of wealth, status and tradition.
This laid the basis for the emergence of ruling elites, a new class with different interests to others in society. They attempted to make rules not just to develop society, but also in order to protect their privileged position. The most successful of these new elites established special bodies of servants and warriors to enforce their rules within society, as well as to protect it from attacks from outside.
This was not a uniform, straight-line process. In many groups, research suggests that an emerging ruling class was blocked from consolidating a grip on power, and collective organisation was re-established. Some hunter-gatherer societies traded with societies that had developed agriculture and at the same time chose to remain as they were instead of adopting the farming methods of their neighbours.
But the rapid growth in the size of the populations due to the Neolithic revolution often created a threat to nearby hunter-gatherer groups. Neolithic societies expanded, sometimes at a ferocious rate, needing more and more land to feed their ever-expanding populations.
31. Socialism Today (February 2022) The history of humankind. Available at https://socialismtoday.org/the-history-of-humankind (Accessed 24 February 2026).
32. Christine Thomas (2010) Women and the struggle for socialism. Available at https://www.socialistparty.org.uk/articles/11204/19-02-2011/part-one-a-history-of-women-s-oppression-1-have-women-always-been-oppressed/ (Accessed 24 February 2026).
