Columbia subject headings:
Clausewitz, Carl von, 1780-1831.
Engels, Friedrich, 1820-1895.
Kant, Immanuel, 1724-1804.
Marx, Karl, 1818-1883.
Peace.
Tolstoy, Leo, graf, 1828-1910.
War.
Harvard subject headings:
Clausewitz, Carl von, 1780-1831
Engels, Friedrich, 1820-1895
Kant, Immanuel, 1724-1804
Marx, Karl, 1818-1883
Peace
Tolstoy, Leo, graf, 1828-1910
War
Princeton subject headings:
Clausewitz, Carl von, 1780-1831.
Engels, Friedrich, 1820-1895.
Kant, Immanuel, 1724-1804.
Marx, Karl, 1818-1883.
Peace.
Tolstoy, Leo, graf, 1828-1910.
War.