This is a short essay included in Turning Back the Clock that addresses the question: What is an enlightened thinker? While he lists several traits that are found in the modern enlightened thinker, he asserts that two essential qualities are common sense and skepticism.
While I am in complete agreement regarding Eco’s assertion about common sense, I am somewhat more skeptical when it comes to his claim on skepticism (a pun is intended here). While it is true that healthy skepticism promotes inquiry and testing of claims that are posited as fact, in the information age where a quick Google search can turn up supporting “data” for any claim, regardless of how ridiculous it may be, skepticism has opened the door to the denial of proven information that is crucial to society and humanity. The perfect example is climate change. The theory of biological imperialism asserts that a species will alter its environment to make it more conducive to its survival and comfort. It’s a hard theory to refute. If you accept this premise, then it stands to reason that humans, in modifying their surroundings, have changed the environment. When you consider this fact in conjunction with scientific evidence of changes in the climate and their connection with human activity, then our impact on climate change should be evident and not disputed. In spite of this, there is no shortage of “skeptics” who reject scientific findings and bolster their views with supporting data from “experts” in the field (often hired by corporations). And there is the problem with associating skepticism with enlightened thinking.
While I agree with 99% of what Eco asserts, I feel he is off in this area. There is a real danger in skepticism and I feel that common sense is much more important than skepticism. Hence to quote the old adage: Common sense is not all that common.