Here's a breakdown of John's reactions to specific aspects of the Brave New World:
* Technology and science: John is deeply disturbed by the World State's reliance on technology and science to control and manipulate human life. He sees it as a violation of nature and a dehumanizing force. He finds the Bokanovsky Process and the conditioning of children abhorrent, deeming them "unnatural" and "inhuman."
* Sexuality and promiscuity: John's Puritanical background makes him deeply uncomfortable with the World State's casual attitude towards sex. He sees it as a cheap substitute for genuine love and connection. He is repulsed by the promiscuous behavior of the citizens, especially the "feelies" and the constant use of soma.
* Consumerism and materialism: John is appalled by the World State's obsession with consumption and material possessions. He views it as a shallow and meaningless pursuit, ultimately leading to emptiness and dissatisfaction. He rejects the World State's constant pursuit of "happiness" through material goods and pleasure.
* Lack of individuality: John is deeply saddened by the lack of individuality and personal freedom in the World State. He yearns for a life of purpose and meaning, finding the World State's controlled existence to be utterly devoid of both.
Ultimately, John's reaction to the advances of the Brave New World can be summarized as a deep sense of alienation and disillusionment. He struggles to reconcile his traditional values with the realities of this new world, ultimately leading to his tragic demise.