The fifth paper in this series, "Grundlagen einer allgemeinen Mannigfaltigkeitslehre" ("Foundations of a General Theory of Aggregates"), published in 1883, was the most important of the six and was also published as a separate monograph.
The concept of a black hole follows naturally from Albert Einstein's General Theory of Relativity, published in 1915.
John Rawls's "A Theory of Justice," published in 1971, has cast a long shadow over modern political philosophy.
In 1766 Johann Heinrich Lambert of the Berlin Academy composed Die Theorie der Parallellinien ("The Theory of Parallel Lines"; published 1786), a penetrating study of the fifth postulate in Euclidean geometry.
"Purity of heart, if one could attain it, would be to see clearly and to act with grace and self-command from this point of view," says the last sentence of "A Theory of Justice," published in 1971.
Other movements and ideas that still shape our lives have either had or soon will have centenaries, from Einstein's general theory of relativity (published in 1916) to the Russian revolution (1917).
The Theory of Science, published in 1837, marks the realization of the project, enlarged in the broader context of general epistemology and methodology of science.
In concocting the theory, Einstein relied on thought experiments—as he had in developing the special theory of relativity, published in 1905, which showed that space and time are fungible aspects of a single spacetime.
While Kantian perspectives the a priori "constitution of the object"—still linger, the "Philosophical Significance of the Theory of Relativity", published in French in 1922, signals a break with some of Reichenbach's previous views (1922c).
In his Wissenschaftslehre, or Theory of Science, published in 1837, he argued for the existence of what he called 'Sätze an sich,' or sentences in themselves, which he clearly distinguished from linguistic items or mental phenomena.
Gravitational waves are an important prediction of Einstein's general theory of relativity, published a century ago.
