Although influential in his own day, Karl Leonhard Reinhold's contribution to late 18th and early 19th century thought has long been overshadowed by the towering presence of Immanuel Kant, the thinker whose ideas he helped to interpret and disseminate. Today, however, a more nuanced understanding of Reinhold's contribution to post-Kantian thought is emerging. Apart from his exposition of Kant's critical philosophy, which played a significant role in the development of German idealism, Reinhold's role in the intellectual movement of Enlightenment and his contributions to early linguistic philosophy are now receiving scholarly attention. In the English-speaking world, where few translations of his work have been attempted, Reinhold has mostly been overlooked. This imbalance is corrected in the present work: the first translation into English of Reinhold's major work of philosophy, the New Theory of the Human Capacity for Representation (1789). The translators provide an overview of the main currents of thought which informed Reinhold's philosophical project, as well as notes on his reading of Kant and other important thinkers of Reinhold's day. A glossary of key terms, a bibliography of scholarly work on Reinhold and suggestions for further reading are also included.

Based on sophisticated clinical descriptions and characteristic symptom patters occurring during the long-term course of psychiatric diseases, Leonhards classification requires that all the clinical features fit for a diagnosis to be made. Always using his own life-long case studies, Leonhard divided the endogenous psychoses into five main nosological groups: on the one hand, the prognostically favourable unipolar affective psychoses, bipolar affective psychoses and cycloid psychoses, and, on the other hand, the prognostically unfavourable unsystematic and systematic schizophrenia. In the meantime, the reliability and validity of this classification have been confirmed by scientific studies and early results provide guidelines for the different origins and varied therapeutic approaches for the specific disease profiles.

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Based on sophisticated clinical descriptions and characteristic symptom patters occurring during the long-term course of psychiatric diseases, Leonhards classification requires that all the clinical features fit for a diagnosis to be made. Always using his own life-long case studies, Leonhard divided the endogenous psychoses into five main nosological groups: on the one hand, the prognostically favourable unipolar affective psychoses, bipolar affective psychoses and cycloid psychoses, and, on the other hand, the prognostically unfavourable unsystematic and systematic schizophrenia. In the meantime, the reliability and validity of this classification have been confirmed by scientific studies and early results provide guidelines for the different origins and varied therapeutic approaches for the specific disease profiles.

Although influential in his own day, Karl Leonhard Reinhold's contribution to late 18th and early 19th century thought has long been overshadowed by the towering presence of Immanuel Kant, the thinker whose ideas he helped to interpret and disseminate. Today, however, a more nuanced understanding of Reinhold's contribution to post-Kantian thought is emerging. Apart from his exposition of Kant's critical philosophy, which played a significant role in the development of German idealism, Reinhold's role in the intellectual movement of Enlightenment and his contributions to early linguistic philosophy are now receiving scholarly attention. In the English-speaking world, where few translations of his work have been attempted, Reinhold has mostly been overlooked. This imbalance is corrected in the present work: the first translation into English of Reinhold's major work of philosophy, the New Theory of the Human Capacity for Representation (1789). The translators provide an overview of the main currents of thought which informed Reinhold's philosophical project, as well as notes on his reading of Kant and other important thinkers of Reinhold's day. A glossary of key terms, a bibliography of scholarly work on Reinhold and suggestions for further reading are also included.