Authors and thinkers
Author

Thomas Piketty

16 key ideas across 2 books, each explained in our own words.

Capital and Ideology

  1. IDEA 1

    Every inequality has an ideology

    Piketty argues that inequality is always justified by ideas about what is fair. He calls each system an inequality regime, held together by beliefs about property, merit and order. These beliefs can change.

  2. IDEA 2

    Old societies had three orders

    Piketty describes ternary societies, divided into clergy, warriors and workers. These systems, found in Europe and India, justified inequality through religious and social roles. Each group had a fixed place in the social order.

  3. IDEA 3

    Property became sacred

    Piketty describes proprietarian societies of the nineteenth century, which treated private property as almost sacred. This belief justified high inequality and limited taxation. Owners' rights were placed above most other claims, even when inequality grew extreme.

All 8 ideas from Capital and Ideology →

Capital in the Twenty-First Century

  1. IDEA 1

    History and policy shape inequality

    Piketty uses centuries of tax and wealth records to study inequality in many countries. He argues that inequality is not a natural law but is shaped by politics, wars and economic policy.

  2. IDEA 2

    Returns on capital outpace growth

    Piketty's central claim is that when the return on capital, r, is higher than economic growth, g, wealth tends to become more concentrated. Those who own capital grow richer faster than the economy as a whole.

  3. IDEA 3

    Inequality fell for special reasons

    Piketty argues that inequality fell in the mid-twentieth century mainly because of world wars, depression and policies like progressive taxes. He suggests this was an exception, not a natural trend.

All 8 ideas from Capital in the Twenty-First Century →

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