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3 Random Tidbits

Topic:
H4-Post Medieval

Post Medieval by Mike Prestwood. 
Stories from 1500 to 1950. 
The history of modern civilization. 
New looks at the Renaissance, Enlightenment, and the rise of science.

H4-Post Medieval.

3 random tidbits in about 5 minutes.

A H4-Post Medieval FAQ.

Subject: The History of Existentialism in 4 Minutes!.
Existentialism was born in post medieval Europe, but it’s focus on the self and your own thoughts echos Daoism and Buddhism in the East and Stoicism and Epicureanism in the West.

The central point is this.

Modern existentialism has roots going back to the late 1700s and modern psychology has roots back to the late 1800s. Both have deeper roots going back to prehistory. Kierkegaard’s focus on anxiety is part of the story of psychology. Existentialism explores the meaning from a nihilistic view. While it can be fatalistic, modern externalism focuses on living fully and authentically.

Now, the details…

In many ways the history of existentialism is the history of psychology. Both are about our struggles and have deep roots going back to prehistory. Ancients from the Buddha to Socrates laid the groundwork. For our story, let’s start with Arthur Schopenhauer, born 1788.

Schopenhauer painted a bleak picture of life. He viewed life as driven by blind will, leading to suffering. While other traditions like Buddhism focus on alleviating suffering, he said our desires and pursuits only lead to disappointment. He embraced the darkness and advised a life of little to no pleasures and desires. This bleak outlook paved the way for the focus on existence and the absurd.

Søren Kierkegaard, born 1813, saw angst as a necessary guide to living authentically. He argued that life is a series of choices and a series of confrontations with anxiety. In my writing, I reframe his “leap of faith” toward his Christianity, as a leap of faith with each decision. His focus on angst laid the groundwork for the birth of psychology in 1879.

Friedrich Nietzsche, born 1844, took Schopenhauer’s pessimism and transformed it into individual creativity and self-overcoming. He shattered traditional values, famously proclaiming “God is dead,” urging humanity to create its own meaning.

Peter Zapffe, born 1899, took this further, seeing human consciousness itself as a tragic evolutionary misstep, too aware of its own futility. Finally, Albert Camus, born 1913, explored how to live authentically in an absurd, indifferent world, advocating rebellion against despair through personal freedom and joy.

The history of existentialism offers two paths: one leading to despair and nihilism; and the other sees our mental struggles as challenges to overcome, enabling us to live life fully and authentically.

 


That H4-Post Medieval FAQ, 

was first published on TST 1 year ago.

By the way, the flashcard inspired by it is this.

Front: What are the two existential paths?
Back: Despair and Defiance

 

A H4-Post Medieval Quote.

From History:
Subject: Planck Constant.
Breakthroughs often occur when conviction gives way to honesty.

At its core.

Planck didn’t advance physics by defending what he believed, but by surrendering it when the evidence refused to cooperate. His “act of despair” reminds us that truth doesn’t yield to confidence. It yields to honesty—especially at the moment when our most trusted explanations stop working.

Now, the details…

Planck was famously conservative and struggled with the fact that his math had accidentally upended the foundations of classical physics. His full quote is closer to this: 

“It was an act of despair… I was ready to sacrifice any of my previous convictions about physics… for the sake of finding a theoretical explanation.”

Planck’s “trick” was essentially a move of mathematical desperation: he abandoned the long-held belief that energy flows in a smooth, continuous stream and instead modeled it as being exchanged in tiny, finite “packets” or quanta.

To understand how he did it, you have to look at the “Ultraviolet Catastrophe.” Classical physics predicted that an object absorbing and emitting all light (a blackbody) should emit infinite energy at short wavelengths (ultraviolet). This was clearly impossible—it suggested that simply turning on an oven would blast the room with lethal X-rays. Current math and theories had to change.

By forcing the energy to be divided into these discrete chunks, he was able to statistically weigh the probabilities so that high-frequency (ultraviolet) light wouldn’t drain all the energy from the system, effectively “taming” the math to match nature. It was the physics equivalent of realizing that instead of pouring water (continuous), nature was actually handing out individual ice cubes (discrete).

The same year of his epiphany, he presented his revolutionary formula:

 
E=hv

This formula says that energy equals a constant number times the color of light (the vibration or frequency). This formula established that an energy packet of light is strictly determined by its frequency. By its color. The h in his formula is the Planck Constant: a value he reverse engineered in the months after his epiphany. Essentially, he worked backward from the experimental data like a tailor trying to find the exact “stitch size” needed to keep a fabric from tearing. By treating the vibrating atoms in the blackbody as if they could only exchange energy in specific, fixed amounts, he discovered that a universal constant was required to link a wave’s frequency to its energy. 

At the time, he didn’t even call it “the” formula; he saw it as a “lucky intuition” that happened to fit the experimental data perfectly. He later presented the full theoretical justification (the “how”) to the German Physical Society on December 14, 1900: a date now considered the birthday of quantum physics.

 


That H4-Post Medieval Quote, 

was first published on TST 2 months ago.

By the way, the flashcard inspired by it is this.

Front: What is Planck’s constant?
Back: Quantum scale factor (energy unit size)

 

A H4-Post Medieval Story.

From History:
Subject: Observational Empiricism.
born 1564.
Lived from 1564 to 1642, aged 77.
Galileo, the Father of Modern Physics, showed that careful observation and math could overturn ancient certainty.

To clarify.

By 1610, Galileo started transforming humanity’s view of the universe through observation and math. His 1638 work Two New Sciences laid foundations for physics and influenced later breakthroughs, including calculus.

Now, the details…

18 Generations Ago

30 Philosophers, Chapter 21: Galileo and the Scientific Revolution. 
Galileo Galilei, more of a scientist than a traditional philosopher, forever altered our understanding of nature. He was born on February 15, 1564. Galileo was a great scientist in his time. His “way,” his method, of performing science helped push us toward our modern approach. The story of Galileo is also the story of Copernicus, and the story of modern cosmology. This is the era in which humanity started to learn about the fundamental structure of the universe. Galileo’s book “Two New Sciences,” published in 1638, contains his most significant contributions to science, particularly his work on motion and the strength of materials. Galileo was a master mathematician, and his contributions to mathematics were both scientific and philosophical. Galileo’s ideas about the infinitesimal were so clear, within decades, both Isaac Newton and Gottfried Leibniz independently developed calculus. Still under house arrest, he passed away at the age of 78 in January 1642.

 


That H4-Post Medieval Story, 

was first published on TST 2 years ago.

By the way, the flashcard inspired by it is this.

Front: What key scientific approach did Galileo champion?
Back: Mathematical experimentation

 

The end. Refresh for another set.

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Writing and coding by Michael Alan Prestwood.
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