Not invented here (NIH) is the philosophical principle of not using third party solutions to a problem because of their external origins. False pride often drives an enterprise to use less-than-perfect invention in order to save face by ignoring, boycotting, or otherwise refusing to use or incorporate obviously superior solutions by others.
== Psychology ==
The reasons for not wanting to use the work of others are varied, but can include fear of patent infringement, lack of understanding of the foreign work, an unwillingness to acknowledge and/or value the work of others (jealousy), or forming...