This takes us back to John Stuart Mill, the great nineteenth-century economist and philosopher, who believed that nobody can be a good economist if he or she is just an economist.
Most economics students are not required to study psychology, philosophy, history, or politics. They are spoon-fed models of the economy, based on unreal assumptions, and tested on their competence in solving mathematical equations. They are never given the mental tools to grasp the whole picture.
My current source of multi disciplinary thinking and a source of lessons from wide selection of topics and areas is the Farnam Street.