The American historian H. Arnold Barton has characterised Birckner, alongside with Niels Ditlev Riegels, as being one of "the most original thinkers" of the radical group of authors in Denmark in this period.
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He especially worked on the problem about the freedom of press and its limits, which among other things the recent conviction of the satiric poet Peter Andreas Heiberg had incurred in Danish debate.
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