Hedgehogs

Hedgehogs view the world through the lens of a single defining idea.

Isaiah Berlin gives following examples in domains of art and philosophy: Plato, Lucretius, Dante Alighieri, Blaise Pascal, Georg Wilhelm Friedrich Hegel, Fyodor Dostoyevsky, Friedrich Nietzsche, Henrik Ibsen, Marcel Proust and Fernand Braudel.

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Hedgehog theories of intelligence

Hedgehogs would represent individuals or theories that focus on a single type of intelligence or a unifying principle of intelligence. Traditional views of intelligence, such as IQ tests, often fall into this category, as they tend to measure a narrow set of abilities.