Dynamite Invented
In 1866, the Swedish chemist and engineer Alfred Nobel developed dynamite, an explosive that was far safer to handle than the nitroglycerin on which it was based. Patented in the following years, it transformed mining, tunneling, and construction, and it also gave armies and insurgents a powerful new tool. Its commercial success made Nobel one of Europe's wealthiest industrialists, and his fortune later funded the Nobel Prizes.
Nitroglycerin had been first synthesized in the 1840s by the Italian chemist Ascanio Sobrero, who was himself alarmed by how violently and unpredictably it detonated. The liquid could explode from a knock, a jolt, or a temperature change, which made it nearly unusable at scale. Nobel's family ran an explosives and munitions business, and Alfred began experimenting with nitroglycerin in the early 1860s. In 1864 an explosion at the family's factory near Stockholm killed several people, including his younger brother Emil. Authorities restricted work in the city, and Nobel moved his experiments to a barge and then to sites outside town.
His central insight was to stabilize nitroglycerin by absorbing it into an inert porous material. He used kieselguhr, a fine, silica-rich earth made from fossilized diatoms, which turned the liquid into a paste that could be shaped into sticks and was much less sensitive to shock. He named the product dynamite, from the Greek word for power. Nobel had earlier introduced a practical detonator, the blasting cap, which let nitroglycerin-based explosives be set off reliably and on demand. Together, these inventions made controlled blasting far more practical. Dynamite was patented in several countries in the late 1860s, and Nobel built factories across Europe and beyond.
The consequences were immense. Dynamite sped the digging of railway cuttings, canals, and tunnels, including major Alpine rail tunnels, and it made deep-vein mining more productive. Quarrying and harbor works also benefited. Yet the same material was used in warfare and sabotage, and by the late nineteenth century it became associated with anarchist violence. Nobel later developed other explosives, including gelignite and ballistite, and held many patents over his lifetime.
Nobel's legacy is distinctly double-edged. He died in 1896, and his will directed most of his estate toward prizes in physics, chemistry, physiology or medicine, literature, and peace. Historians debate how much his motives were shaped by concern over his reputation, a popular story involving a premature obituary being the best known, though the evidence for it is not fully settled. What is clear is that dynamite helped build the industrial age, and its dual uses made it an early example of a technology that serves both construction and destruction.