Who's ready for more World War Two science? No? No one?
Well, this story is about all kinds of badness, yes—but also a lot of incredible goodness.
The history of science up until the Cold War is often overshadowed by the Manhattan Project.
But today we are going to talk about advances in biomedicine, or healthcare based on a biological
understanding of human bodies and diseases.
[Intro Music Plays]
Many biomedical breakthroughs, like antibiotics, were developed in the twentieth century, but
a few are much older. The original wonder drug is a natural pain-relief
compound of the opiate class that is still widely used today—morphine.
A German pharmacist's assistant named Friedrich Sertürner isolated it around 1804.
Morphine induces relaxation and sleepiness, and too much can kill you. Aaaaand it's
super addictive. But very effective and relatively cheap!
Soon, a German company called Merck began selling it. And in the 1850s, the hypodermic
needle was introduced. Now, the last time we talked about medicine,
exciting things were happening: namely, germs! Most diseases are caused by germs.
So, with a germ theory—not to mention a cell theory, and vaccines, and beer—the
life sciences in the late 1800s looked pretty great.
But… vaccines are slow, so if you're dying right now—maybe due to an infected war-wound—they
don't work well. And, they only work on certain diseases. Also,
there just weren't that many vaccines, and there were a lot of diseases. In fact, even
reliable diagnoses were a problem. So what the life sciences had gained in theories
and models, they still lacked in applications. Advances came in the form of chemical compounds
that had specific effects on specific physiological systems.
In 1907, the lab of German chemist Paul Ehrlich created an arsenic compound sold under the
name Salvarsan that was antimicrobial but not toxic to humans.
Ehrlich used Salvarsan to effectively treat syphilis, which was a huge deal: the first
modern chemical therapeutic could treat one of the biggest public health problems!
But Salvarsan didn't work on late-stage syphilis patients who suffered from general
paresis of the insane, or GPI. Which had very serious symptoms, including delusions, and
was fatal. But in 1917, Austrian physician Julius Wagner-Jauregg
developed an effective therapy… which involved infecting them with malaria. While weird,
malaria-fever treatment for GPI gave hope to people suffering terribly, and Wagner-Jauregg
won a Nobel for his efforts. Another psychiatric discovery, in 1933, was
insulin shock therapy to treat schizophrenia and other mental disorders: patients were
dosed with the hormone insulin, causing them to go into shock and then a coma. It became
common in the 1940s and 50s. But this method of inducing shock wasn't alone; there were
several. The most famous, invented in the 1930s, was
electroconvulsive treatment or ECT. Many people have objected to ECT over the years, and the
exact way it's been used has changed. But today, as a treatment for severe depression,
it's considered safe. One pre-World War Two treatment that is no
longer used is lobotomy, or surgically cutting connections in the brain's prefrontal cortex.
This left patients with reduced responsiveness and awareness. They had literal brain damage,
which could help control severe symptoms of mental disorder.
Lobotomies became common around 1935, first in Europe, then in the United States. Initially,
they were typical psychosurgeries, performed in hospitals.
But in 1945, neuropsychiatrist Walter Freeman figured out how to perform lobotomies using
an icepick. He practiced on a grapefruit at home. And then he went on the road, popularizing
his much faster transorbital technique. In the United States, 40,000 people were lobotomized.
Were they all suffering from severe mental disorders, and did they enjoy better lives
after the surgery? Some probably did. But, unfortunately, in many cases, lobotomies
were used to make patients easier to manage, or for even worse reasons. In 1977, Congress
investigated the history of the lobotomy, concluding that it had often been used to
harm minorities. The biggest advancement in biomedicine at
the time was the development of antimicrobial compounds, like Salvarsan.
In 1931, German chemists developed an effective anti-malaria drug, mepacrine.
Allowing medics to treat soldiers with malaria helped open up much of the world's equatorial
regions to combat during World War Two. Even more revolutionary, Gerhard Domagk
—a researcher working in the same lab that synthesized mepacrine—discovered
sulfanilamide, the first drug that broadly treated a whole
bunch of diseases caused by bacteria. He was awarded the Nobel in 1939… which he was
forced to give back, because Nazis. Sulfanilamide was only the first of a whole
class of antibacterial drugs, the sulfonamides, or sulfas. These were the first antibiotics.
With them, doctors could quickly and cheaply help thousands of patients—treating everything
from meningitis to gonorrhea to burns. But most people today don't go to the doctor
and ask for sulfas. Because in 1928, in the basement laboratory
of St. Mary's hospital in London, Scottish physician and microbiologist Alexander Fleming
noticed, quite by accident, that some mold growing in his lab seemed to kill some harmful
bacteria. He cultured it and started experimenting.
Fleming discovered a whole new class of antibiotic drugs—the penicillins—derived from that
mold, penicillium. Alas—at first, his colleagues didn't understand.
Fleming wasn't great at explaining his work, and it took him years to convince them. A
few doctors used penicillin in the 1930s. But it wasn't until nearly ten years later
that penicillin became a "wonder drug." Again, Merck scaled up production, followed
by Pfizer. And again, World War Two drove demand.
The penicillins pretty much replaced the sulfas during World War two, treating sexually transmitted
diseases, burns, heart infections, scarlet fever, pneumonia, and infections of the skin,
mouth, and throat. Whole categories of disease that had once been deadly became manageable.
This is good news for me by the way because I am allergic to sulfas as I found out
when I took one and became a giant puff.
Later drugs created based on the penicillins,
starting with ampicillin in 1961, were even more effective against more diseases.
Fleming won the Nobel in 1945, sharing it with two other scientists who had figured
out how to scale up production of the mold to industrial levels—English pharmacologist
Howard Florey and German biochemist Ernst Chain. They were all knighted.
So yay, more treatments for more diseases, and doctors being knights. Unfortunately,
one medical pioneer was definitely not treated with this respect. Introduce us, ThoughtBubble:
African-American surgeon Charles Drew showed
enormous promise. He graduated from medical school at McGill University in Montreal, Canada,
in 1933 and became an instructor at Howard University in Washington, D.C., in 1935. A
year later, he became a surgical resident at Freedmen's Hospital.
And in 1938, Drew earned a Rockefeller Fellowship to study at Columbia University and work at
Presbyterian Hospital. There, he became the first African-American doctor of medical science.
His doctoral thesis, "Banked Blood," revolutionized medicine.
Drew realized that blood plasma—the clear part, without cells—lasts a lot longer than
whole blood. He worked out how to bank, or store plasma for longer periods of time. He
also discovered that plasma can be dried and rehydrated as needed.
Anticipating terrible casualties, and drawing
on lessons from the first World War, New York's Blood Transfusion Betterment Association met
with British physician John Scudder to formulate a plan. Scudder had heard of Drew's work
on plasma and hired him as soon as he earned his doctorate, in 1940.
Drew's new job was to coordinate Blood for Britain. His team collected and processed
blood plasma from different hospitals in New York, shipping it overseas to save Allied
lives. A year later, Drew led another large-scale
blood project, this time for the American Red Cross and the U.S. military. But there
was a catch: the military wanted Drew to segregate the blood donated by African Americans from
that donated by whites. Understandably outraged, Drew resigned after only a few months.
By the end of 1941, when Drew returned to Howard, he had created two of the first large
blood banks. But he was not a knight, and his country was still so deeply racist that
even its official supply of lifesaving biomaterials was segregated.====
In 1950, Drew died in a car accident. He was only forty five years old.
Thanks, Thoughtbubble. But this was far from the worst offense in World War Two. The Nazis
also undertook systematic research on human biology and medicine—all within the paradigm
of Rassenhygiene, or racial hygiene. This was German eugenics: the application
of a distorted understanding of Darwinian evolution to human society.
The Nazis believed that certain human groups were better than others, and that biology—not
nurture—determined everything. But they wanted proof.
In the 1920s, the racial hygienists had to wait around. But with the Nazi takeover in
1933, they had the research material they needed to understand the human body at a deep
level, in the form of Jewish people and others whom the Nazi state didn't consider fully
human. During World War Two, Nazi scientists such
as Josef Mengele performed experiments on humans in concentration camps. Among other
atrocities, Mengele conducted studies of genetics, including twin studies, but killed subjects
afterwards, sending tissue samples back to Berlin for further analysis.
Like the Allies, the Nazis developed drugs. But the Nazis weren't sure if they should
focus on antibiotics, which kill bacteria, or on homeopathic remedies, which are based
on the idea that a substance that causes disease in a healthy person can cure similar symptoms
in a sick person.
To conduct their tests, the Nazis simulated brutal war injuries on concentration camp
prisoners and then tried to prevent infections using different agents.
Finally, the Nazis developed a robust euthanasia program, or way of testing the cheapest, fastest
ways to kill the most people without causing them to riot.
Meanwhile, in occupied China, an infamous group of biologists and chemists within the
Imperial Japanese Army called Unit 731 carried out some similarly horrifying research.
They cut patients open while they were still alive, without anesthesia. They tested new
biological weapons. They tested the limits of human resistance to hypothermia, or frostbite.
It gets worse, but you get the idea. When the war ended, the United States government
discovered the atrocities committed by the Imperial Japanese doctors… And they cut
a deal: the U.S. would grant certain war criminals immunity in exchange for their data.
So where's the goodness I talked about at the beginning of the episode? Well, after World War Two, more drugs, medical technologies,
and novel procedures emerged. For example, in the 1950s, Jonas Salk and A. B. Sabin created
a polio vaccine, which was very good! But the deeper point is that medicine—now
a global institution—had a long look at itself. The vast majority of doctors and government
officials were absolutely sickened by the revelations of the Doctors' Trial of the
Nazis. Doctors convened and created a new way of
handling medical research with human subjects, the Nuremberg Code of medical ethics. In fact,
a whole new branch of philosophy, bioethics was born.
On the policy side, all human subjects research in the U.S. now has to be approved by institutional
review boards or IRBs. It's a long process in which scientists and regulators scrutinize
what will or won't be done in the name of medicine, to whom, for what purpose. And it's
one of the greatest, quietest moral wins in the history of science.
Next time—we finally bring together Darwin and Mendel in an intellectual super-group
called the Modern Synthesis. Don't miss it!
Crash Course History of Science is filmed in the Dr. Cheryl C. Kinney studio in Missoula,
Montana and it's made with the help of all this nice people and our animation team is
Thought Cafe. Crash Course is a Complexly production. If
you wanna keep imagining the world complexly with us, you can check out some of our other
channels like Scishow, Nature League, and The Financial Diet.
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the series at Patreon; a crowdfunding platform that allows you to support the content you
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