Final answer:
The theme of the text 'Wilderness' is the examination of alternative ways of living, finding truth in individualism and self-sufficiency, and engaging with ideas of modern environmentalism.
Step-by-step explanation:
The theme of the text 'Wilderness' can be identified as the examination of alternative ways of living, often solitary and away from society, and finding truth in individualism and self-sufficiency. The text explores the relationship between human beings and nature, portraying nature in a positive light. It also engages with ideas related to modern environmentalism and environmental justice, making arguments for conservationism and preservation.