Intellectual monopolies disincentivize development and incentivize rent seeking. Here, rent seeking is legal action and lobbying intended to protect and extend monopolies, instead of advancing science.
Other than economic logic, we have natural experiments to back this up: i.e. the steam engine patent granted to Watt and Boulton in 1772 and its chilling effect on engine duty improvement (and the explosion of progress after patent expiry), and the modern pharmaceutical industry developing most strongly precisely where chemical patents were not granted, in 19th C. continental Europe, and slowing down wherever patent protections were eventually introduced, at the request of rent seeking lobbyists.
Other than economic logic, we have natural experiments to back this up: i.e. the steam engine patent granted to Watt and Boulton in 1772 and its chilling effect on engine duty improvement (and the explosion of progress after patent expiry), and the modern pharmaceutical industry developing most strongly precisely where chemical patents were not granted, in 19th C. continental Europe, and slowing down wherever patent protections were eventually introduced, at the request of rent seeking lobbyists.
https://fee.org/articles/do-patents-encourage-or-hinder-inno...
http://www.dklevine.com/papers/anew09.pdf