1928 CE
A year shaped by the Kellogg-Briand Pact's attempt to outlaw war, Alexander Fleming's discovery of penicillin, the launch of the Soviet Union's first Five-Year Plan, and the debut of Mickey Mouse.
Geopolitics & Diplomacy
- The Kellogg-Briand Pact was signed in Paris on August 27 by fifteen nations, renouncing war as an instrument of national policy.
- Chiang Kai-shek's Northern Expedition captured Beijing in June, nominally reunifying China under the Nationalist government based in Nanjing.
- Albania was proclaimed a monarchy on September 1, with President Ahmed Zogu declaring himself King Zog I.
- The Sixth Comintern Congress was held in Moscow from July to September, declaring the social democrats to be social fascists and adopting an ultra-left strategy.
- Transjordan signed a new treaty with Britain in February, gaining a degree of autonomy while remaining under British mandate control.
- The Red Line Agreement was signed on July 31, establishing zones of petroleum exploitation in the former Ottoman Empire among major oil companies.
- Italy signed the Treaty of Friendship with Ethiopia on August 2, pledging peace and cooperation between the two nations.
- Herbert Hoover won the U.S. presidential election in November, defeating Democratic candidate Al Smith in a decisive victory.
- Paraguay and Bolivia severed diplomatic relations in December as border clashes in the Gran Chaco region escalated toward open conflict.
- The Nationalist government in China gained international recognition, with the United States officially recognizing the Nanjing government in July.
Conflict & Security
- The Jinan Incident in May saw Japanese troops clash with Chinese Nationalist forces in Shandong province, killing thousands of Chinese civilians and soldiers.
- Zhang Zuolin, the warlord of Manchuria, was assassinated on June 4 when Japanese officers of the Kwantung Army bombed his train near Mukden.
- The Chinese Communist Party retreated to rural base areas after failed urban uprisings, with Mao Zedong developing guerrilla warfare strategies in the Jinggang Mountains.
- The Cristero War in Mexico continued as Catholic rebels fought government forces, with widespread atrocities committed by both sides.
- Augusto Sandino's guerrilla forces continued to fight U.S. Marines in Nicaragua, gaining support from anti-imperialist movements across Latin America.
- Political violence in Germany escalated as Nazi stormtroopers and communist paramilitaries clashed in streets across the country.
- The Soviet Union intensified its campaign against political opponents, with Stalin consolidating power and beginning the process of expelling Trotsky.
- Ibn Saud completed the unification of the Ikhwan tribal forces that had helped him conquer the Arabian Peninsula, though an Ikhwan revolt was brewing.
- Anti-colonial resistance continued in French Indochina, with Vietnamese nationalists organizing underground despite harsh French repression.
- The Lateran Treaty negotiations between Italy and the Vatican progressed, with Mussolini seeking to resolve the Roman Question.
Economy & Finance
- The Soviet Union launched its first Five-Year Plan in October, beginning a massive program of forced industrialization and agricultural collectivization under Stalin.
- The U.S. stock market surged dramatically, with the Dow Jones Industrial Average rising sharply as speculative buying on margin accelerated.
- The Flood Control Act was signed into law in the United States on May 15, authorizing extensive levee and spillway construction along the Mississippi River.
- Italian economic policy continued to prioritize the strength of the lira, with Mussolini's Quota 90 program causing deflation and hardship for exporters.
- American automobile production reached new heights, with General Motors surpassing Ford as the leading manufacturer in the United States.
- Germany's economy showed signs of overheating as foreign capital inflows slowed and domestic unemployment began to rise.
- The Brazilian coffee industry faced a crisis of overproduction, with the government purchasing and destroying millions of bags of surplus coffee to support prices.
- Japan's economy slowly recovered from the 1927 financial crisis, though rural poverty and agricultural depression persisted.
- The Discovery of oil at Kirkuk in Iraq the previous year spurred international competition for petroleum concessions across the Middle East.
- Consumer spending in the United States continued to rise, fueled by easy credit and the growing availability of installment purchasing.
Technology & Infrastructure
- Amelia Earhart became the first woman to fly across the Atlantic Ocean on June 17-18, traveling as a passenger on the Fokker F.VIIb/3m Friendship from Newfoundland to Wales.
- The first regularly scheduled television broadcasts began on September 11 from WGY in Schenectady, New York, operated by General Electric.
- The Graf Zeppelin airship made its first flight on September 18 and completed its first transatlantic crossing in October, demonstrating the potential of airship travel.
- The Oxford English Dictionary was completed after over 70 years of work, comprising 12 volumes with over 400,000 entries.
- Construction of the Empire State Building was announced, with plans for what would become the world's tallest skyscraper in midtown Manhattan.
- The first color motion pictures using the two-strip Technicolor process were produced in Hollywood, advancing the technology of filmmaking.
- Scottish bacteriologist Alexander Fleming's discovery of penicillin in September began what would eventually become a revolution in medicine.
- The Geiger-Müller counter was developed by Hans Geiger and Walther Müller, enabling precise detection and measurement of radioactive particles.
- Paul Galvin founded the Galvin Manufacturing Corporation in Chicago, which would later become Motorola and pioneer car radios.
- Iron lung machines began to be installed in hospitals across the United States to treat polio patients with respiratory paralysis.
Science & Discovery
- Alexander Fleming discovered penicillin on September 28 at St. Mary's Hospital in London, when he noticed a mold killing bacteria in a petri dish he had left by a window.
- Paul Dirac published the Dirac equation in January, combining quantum mechanics with special relativity and predicting the existence of antimatter.
- George Gamow applied quantum mechanical tunneling to explain how alpha particles escape the nucleus during radioactive decay.
- Chandrasekhara Venkata Raman discovered the Raman effect on February 28, demonstrating the inelastic scattering of light by molecules, for which he would win the Nobel Prize.
- Owen Willans Richardson won the Nobel Prize in Physics for his work on thermionic emission, the phenomenon underlying vacuum tubes and electron guns.
- Adolf Windaus received the Nobel Prize in Chemistry for his research on sterols and their connection to vitamins, particularly vitamin D.
- Margaret Mead published Coming of Age in Samoa, a groundbreaking anthropological study that challenged Western assumptions about adolescence and sexuality.
- The British geneticist J.B.S. Haldane published a series of papers on the mathematical theory of natural selection, advancing the modern evolutionary synthesis.
- Fritz London and Walter Heitler applied quantum mechanics to explain the covalent chemical bond in hydrogen, founding quantum chemistry.
- Ralph Hartley published his foundational paper on information transmission, establishing key concepts that would later influence Claude Shannon's information theory.
Health & Medicine
- Alexander Fleming's accidental discovery of penicillin at St. Mary's Hospital opened the door to the antibiotic era, though practical development would take another decade.
- George Papanicolaou presented his research on using cervical smears to detect cancer cells, laying the groundwork for the Pap smear screening test.
- The iron lung was first used clinically at Boston Children's Hospital, saving the life of a young polio patient with respiratory failure.
- Charles Nicolle received the Nobel Prize in Physiology or Medicine for identifying the body louse as the vector that transmits epidemic typhus.
- Vitamin C was isolated by Albert Szent-Györgyi from adrenal glands, though its identification as ascorbic acid and connection to scurvy would come later.
- The BCG tuberculosis vaccine continued its expansion across Europe, with several countries beginning routine immunization programs.
- Diphtheria immunization campaigns in the United States and Britain continued to reduce childhood mortality from the disease.
- Public sanitation improvements in major cities contributed to declining rates of waterborne diseases such as cholera and typhoid.
- Research into hormones advanced as scientists worked to isolate and characterize various endocrine substances and their physiological effects.
- Psychiatric treatment continued to rely heavily on institutional care, with limited effective therapies available for mental illness.
Climate & Environment
- Atmospheric carbon dioxide concentration was approximately 306 parts per million, as later determined by ice core analysis.
- The Okeechobee Hurricane struck southern Florida on September 16, killing over 2,500 people, most of them migrant farm workers drowned when Lake Okeechobee's dike failed.
- A catastrophic dam failure on the St. Francis Dam in California on March 12 killed over 430 people when a wall of water swept through the Santa Clara River valley.
- Severe flooding struck London and the Thames estuary in January, killing 14 people and prompting calls for improved flood defenses.
- The Dust Bowl conditions on the American Great Plains continued to develop as overcultivation degraded topsoil across the region.
- Coal-powered industry continued to drive urban air pollution across Europe, with London, the Ruhr Valley, and Pittsburgh among the worst-affected cities.
- Deforestation in British colonial territories in Africa and Southeast Asia accelerated to supply timber and clear land for cash crop plantations.
- Severe drought struck parts of northern China, contributing to famine and displacement in rural provinces.
- Conservation organizations in the United States advocated for stronger protections for national forests and wildlife refuges.
- Volcanic activity at Mount Etna in Sicily produced significant lava flows, threatening nearby communities on the eastern slopes.
Culture & Society
- Walt Disney's Steamboat Willie premiered on November 18, introducing Mickey Mouse to the world in the first fully synchronized sound cartoon.
- D.H. Lawrence published Lady Chatterley's Lover privately in Florence, Italy, as its explicit content made publication in Britain or the United States impossible.
- The Olympic Games were held in Amsterdam from July 28 to August 12, featuring women's track and field events for the first time.
- Maurice Ravel's Boléro premiered in Paris on November 22, performed by the Ballets Ida Rubinstein, and became one of the most popular orchestral works of the century.
- Bertolt Brecht and Kurt Weill's The Threepenny Opera premiered in Berlin on August 31, becoming a sensation of Weimar-era theater.
- George Gershwin composed An American in Paris, a symphonic poem inspired by his time in the French capital, which premiered in December.
- Evelyn Waugh published his first novel, Decline and Fall, a satirical portrait of English society in the 1920s.
- The Indian National Congress, under the leadership of Jawaharlal Nehru, demanded full independence from Britain rather than dominion status.
- Women in Britain gained equal voting rights with men under the Representation of the People (Equal Franchise) Act, passed on July 2.
- The world population was approximately 2.01 billion.