One of the main themes is the loss of individuality. In the novel's society, everyone is made to fit into a pre - determined role, and any deviation is not tolerated. Another theme is the power of technology. It has been used to create and control this new world order. Also, the idea of happiness as a form of control is prominent. People are kept 'happy' through drugs and mind - conditioning, but it's a false kind of happiness.
In 'Brave New World', a major theme is the role of the state in controlling the population. The state decides everything from a person's job to their sexual partners. Another theme is the commodification of human beings. People are treated like products in a consumer - driven society. There is also the theme of the clash between the old world (represented by John the Savage) and the new world. This clash shows the fundamental differences in values, such as freedom and self - determination versus conformity and control.
The themes in 'Brave New World' include the devaluation of human emotions. In this world, emotions like love and passion are seen as disruptive. The society values stability above all else. This is achieved through strict social engineering. Additionally, the theme of the relationship between nature and nurture is explored. Are people the products of their genetic makeup or their conditioning? The novel seems to suggest that it's a combination of both in this dystopian setting.