Background
His father Israel Hedenius (1868-1932) was in 1900 a doctor of medicine and teacher of medical practice, and in 1927 was appointed personal physician to the King of Sweden.
philosopher Professor of Practical Philosophy
His father Israel Hedenius (1868-1932) was in 1900 a doctor of medicine and teacher of medical practice, and in 1927 was appointed personal physician to the King of Sweden.
After he completed upper secondary school he studied at Uppsala University where he wrote his doctoral thesis Sensationalism and theology in Berkeley"s philosophy, discussing the philosophy of George Berkeley.
He was Professor of Practical Philosophy at the University of Uppsala (1947-1973). The Swedish Humanist Association, known in Sweden as "Humanisterna", offers the Ingemar Hedenius Award each year to support humanist ideas and critical thinking. Hedenius" grandfather Per Hedenius (1828-1896) was a famous professor of pathology and for a while rector of Uppsala University.
Hedenius" mother, born Anna Bergh, was from an upper class Norwegian family.
The two married in 1905 and had three children: Per (1905), Ingemar and Ann Marie (1909). Both parents were very religious.
Ingemar took the entrance examination for the Norra Latin school in 1927. Svante Nordin, professor of history of science and ideas at Lund University, published a book in 2004 called Ingemar Hedenius: en filosof och hans tid (Ingemar Hedenius: a philosopher and his time).
This gives a picture of Ingemar Hedenius based on a rich collection of letters and other documents.
According to the text at the back of the book, Hedenius was "a person with strong musical, artistic and literary interests. harsh both in writing and in speech with enemies and opponents, gentle and sensitive with his friends."
Hedenius became best known for his book Tro och vetande (Belief and Knowledge), published in 1949. This book started off one of the most wide-ranging cultural debates ever in Sweden. In Belief and Knowledge he described three postulates which theology does not comply with, to show that it is not possible to have a rational debate about religion.
According to Hedenius this means that theology can not be classed as knowledge, but belongs outside it as "quasi-knowledge":
The religion-psychology postulate: A religious belief contains metaphysical assumptions which science can neither verify nor falsify, for example, assertions of the existence of God, or the immortality of the soul.
The language theory postulate: lieutenant must be possible to communicate the religious comprehension and experience even to non-believers. The logic postulate: Two truths cannot contradict each other.
Of two contradictory statements, at most one can be true. Theology not only contains theses which contradict what we know about reality (first postulate) without accepting also inner contradictions, for example, the oldest and according to Hedenius also insoluble problem of evil.
Amongst other things, he proposed that the study of religions and their development should be separated from theology and become a non-religious academic discipline.