An introduction to historical materialism - part two
The whole of human history consists precisely in the struggle of humankind to raise itself above the animal level. This long struggle began seven million years ago, when our remote humanoid ancestors first stood upright and were able to free their hands for manual labour. Ever since then, successive phases of social development have arisen on the basis of changes in the development of the productive force of labour – that is to say, of our power over nature.