"Do the plants we cultivate control us as much as we control them?" This book explores how four popular plants – apples, tulips, marijuana, and potatoes – shape human behavior while fulfilling their own desires for survival and propagation.
1. Humans and plants form a reciprocal relationship.
The relationship between humans and plants goes beyond simple utility; it's a partnership. While humans harvest plants for food, beauty, or intoxication, plants exploit human desires to ensure their survival. By catering to human cravings, plants effectively enlist us as agents for spreading their seeds and cultivating their growth.
For instance, the apple tree uses its sweet fruit to entice humans to propagate its seeds. Similarly, flowers appeal to our sense of beauty, leading humans to grow and nurture them for ornamental purposes. This symbiosis is an ongoing evolutionary strategy that serves the survival interests of both parties.
The idea challenges the belief that humans are always the “subjects” in nature while plants are the “objects.” In reality, plants can subtly manipulate human behavior, much like they attract bees and insects to pollinate them.
Examples
- Apple trees thrive as humans plant their seeds for their sweet fruit.
- Bees are drawn to flowers' nectar, unknowingly aiding in pollination.
- Oaks depend on squirrels burying acorns, spreading their seeds.
2. The story of Johnny Appleseed showcases adaptability in nature.
Johnny Appleseed, or John Chapman, had an incredible impact on developing apple varieties in North America. By planting thousands of apple seeds, Chapman fostered the spread of apple trees suited to the American climate, transforming its landscape and forever altering its agricultural history.
European apples initially struggled in the harsh American environment. Chapman’s approach of planting a variety of seeds allowed for natural selection to identify apple strains fit for the challenging conditions of the frontier. In doing so, he ensured the survival and proliferation of apples in North America.
Beyond just spreading apple seeds, Chapman’s efforts catered to thirst: the apple became a source for cider, a go-to drink for early Americans since water was often unsafe to consume.
Examples
- Chapman planted millions of apple trees by the time of his death in 1845.
- Apple cider became a staple beverage in 19th-century American households.
- Settlers were legally required to grow apple trees, aiding Chapman's business.
3. Modern apple varieties have sacrificed diversity for taste and appearance.
In the past, markets brimmed with thousands of apple types. Over time, commercial growers narrowed this variety, focusing primarily on apples that are sweet and visually appealing to meet consumer demands.
This reduction of genetic diversity comes with risks. A genetically diverse apple population could better withstand diseases and pests, offering natural protection for the species. Today, institutions like the Plant Genetic Resources Unit work to preserve and recover rare apple varieties to safeguard future resilience.
The narrowing focus on beauty and sweetness has dulled our appreciation for apples’ original complex flavors. While modern snack foods have far surpassed apples in sweetness, they once stood as a treasured, rare source of sugary delight.
Examples
- Rare apple types are preserved in collections like the orchard in Geneva, New York.
- Commercial breeds like Red Delicious prioritize appearance over taste.
- Apples’ simple sweetness once inspired work like Jonathan Swift’s poetry.
4. Flowers hold a universal appeal due to our desire for beauty.
Flowers have fascinated humans for centuries as symbols of beauty. From Egyptians treating them as sacred to the Renaissance explosion of tulip “mania,” flowers trigger an emotional response distinct from functional benefits like nourishment.
Humans’ attraction to flowers likely has evolutionary roots. In identifying flowering plants, early humans could predict food availability, which increased survival odds. This primal connection remains evident today, as psychiatry even uses an indifference to flowers as a marker for depression.
The obsession with flowers can also have dangerous outcomes, like the economic turmoil of 17th-century tulipmania in Holland, when speculation drove tulip bulbs to astronomical prices, crashing the economy when the bubble inevitably burst.
Examples
- Egyptians buried their dead with flowers for the afterlife.
- Psychiatric studies link flower appreciation to mental well-being.
- Tulipmania saw tulip bulbs once costing as much as canalside homes in Amsterdam.
5. Marijuana reveals humans’ age-old love for intoxication.
Throughout history, people have sought plants like marijuana to experience altered states of consciousness. From feelings of euphoria to enhanced creativity, cannabis taps into this innate thirst for mental transformation.
Laws restricting marijuana inadvertently improved it. Prohibition forced growers to move production indoors, where they discovered ways to enhance the plant’s potency by fine-tuning growth factors like light and nutrients. This resulted in cannabis strains with THC levels far greater than anything found in nature.
Yet, marijuana’s ability to alter perceptions isn’t purely recreational. Research shows it leads to a deeper understanding of how the human brain functions, unlocking insight into neurological processes related to pleasure and memory.
Examples
- Ancient cultures used psychoactive plants for spiritual experiences.
- THC levels in marijuana jumped from 3% to 20% after indoor cultivation techniques.
- Bans on outdoor growing led to experimentation and innovation in cannabis.
6. Researching cannabis advanced scientific understanding of the brain.
Cannabis’s psychoactive effects sparked decades of scientific inquiry, leading to important discoveries about the brain. In the 1960s, THC was identified as its active compound. Further work revealed cannabinoid receptors in the brain designed specifically to interact with THC.
These receptors are part of a neural network responsive to chemicals like dopamine, serotonin, and the brain’s own THC-like chemical, anandamide. This substance aids in pain management and mood stabilization, underpinning marijuana’s mind-altering effects.
This research helps scientists explore how cannabinoids may influence various aspects of life, including childbirth (via cannabinoid receptors in the uterus) and our capacity to endure routine tasks without mental fatigue.
Examples
- Pigeons eating cannabis led ancient people to recognize its effects.
- Anandamide, named for “inner bliss,” mirrors THC’s structure in the human brain.
- Cannabinoid receptors are linked to labor pain relief in women.
7. The potato gave people control over food security.
The introduction of potatoes in Europe revolutionized agriculture. Unlike bread, which required extensive resources for production, potatoes could be grown by anyone with a small plot of land, offering sustenance and independence.
This newfound control improved survival rates and eliminated famine in many regions. Potatoes arguably shifted political power towards Northern Europe, enabling its nations to grow in strength and global dominance.
In modern times, humans have extended this control through genetic modification. The New Leaf Potato, designed to resist pests, represents an era of gene editing that raises both hopeful possibilities and ethical questions about nature’s manipulation.
Examples
- Potatoes ended starvation for many Northern European communities.
- They fueled the population growth of countries like Ireland and Germany.
- The New Leaf Potato is genetically modified to resist beetle infestations.
8. Plants evolve for survival, using humans as collaborators.
Plants can't move or hunt, but their survival mechanisms prove as strategic as any apex predator’s. By tapping into what humans find sweet, beautiful, or intoxicating, they ensure their propagation.
Humans may think they dominate plants, but the reality is much more mutual. By responding to plants' “rewards,” such as apples’ sweetness or the intoxicating effects of marijuana, humans unknowingly aid in spreading those plants' genes to new environments.
This relationship is evolutionary, showing how both humans and plants adapt together over centuries. Because neither one survives on its own, a balance of interests persists, reflected in everything from the simplest potato crop to the rarest tulip flower.
Examples
- Humans breed plants like potatoes for specific agricultural needs.
- Genetically modified crops blur nature’s evolutionary boundaries.
- Sweet apple varieties symbolize how nature manipulates tastebuds.
9. Plants’ survival strategies reflect universal life principles.
The strategies plants use to thrive—whether appealing to taste, appearance, or intoxication—mirror broader truths about life’s adaptability. Plants are constantly iterating on techniques to colonize new spaces, overcome predators, and maintain balance.
While plants lack consciousness as we know it, their evolutionary tactics mirror intelligence. Apple seeds adapt to their environment through chance genetic recombination; marijuana’s psychoactive properties make it so compelling humans grow it in demand despite legal barriers.
By observing plant behavior, humans gain fresh perspectives on adaptability and the interconnected nature of ecosystems, redefining what it means to be “in control.”
Examples
- Oak acorns grow thanks to forgetful squirrels planting them.
- Tulips’ ephemeral beauty ensured human obsession during tulipmania.
- Cannabis rewards humans with euphoria, ensuring its cultivation under prohibition.
Takeaways
- Appreciate the role of biodiversity in food systems: Preserve genetic diversity in crops like apples to protect against potential future diseases.
- Rethink humanity’s control over nature: Recognize the give-and-take relationship with plants and stop taking nature’s resources for granted.
- Be mindful of the risks of GMOs: Understand both the benefits and uncertainties involved with genetically modifying foods for age-old desires like security and control.