1. Survival: This is arguably the most prominent theme. The novel focuses on the struggle for survival in a post-apocalyptic world where humanity is threatened by the carnivorous Triffids. Characters must adapt to new realities, learn new skills, and overcome immense challenges to simply stay alive.
2. Humanity and Morality: The story explores the darker aspects of human nature as society collapses. The struggle for survival brings out both the best and worst in people. Some characters exhibit compassion, courage, and resilience, while others succumb to greed, violence, and selfishness.
3. The Fragility of Civilization: Wyndham shows how quickly civilization can crumble when faced with a catastrophic event. The breakdown of societal structures, the loss of technology, and the chaos that ensues demonstrate the vulnerability of human progress.
4. The Power of Nature: The Triffids represent a powerful force of nature that humans have underestimated and ultimately cannot control. Their existence raises questions about the balance between humanity and the natural world, and the potential consequences of tampering with nature.
5. The Importance of Community: The novel emphasizes the importance of cooperation and community in the face of adversity. Individuals who are able to work together and support each other have a greater chance of survival.
6. Hope and Resilience: Despite the bleakness of the situation, "The Day of the Triffids" ultimately presents a message of hope. Even though the world has been transformed, there are still survivors who are determined to rebuild and create a new future.
7. The Value of Individuality: The novel features a diverse cast of characters who represent different viewpoints and approaches to survival. This showcases the importance of individual initiative and the unique skills that each person brings to the table.
8. Technology and its Consequences: The Triffids are a product of human scientific experimentation, highlighting the dangers of unchecked scientific progress and the potential for unintended consequences.
9. The Nature of Fear: The story explores how fear can paralyze people and lead them to make irrational decisions. It also examines the ways in which fear can be overcome through courage and determination.
Let me know if you'd like a more in-depth look at any specific theme!