Complex sentence: Naivety (or naïvety, naïveté, etc.), is the state of being naive (from the French naïve)--having or showing a lack of experience, understanding or sophistication, often in a context where one neglects pragmatism in favor of moral idealism.
Split into simpler sentences: Naivety (or naïvety, naïveté, etc.), is the state of being naïve. That is to say, having or showing a lack of experience, understanding or sophistication, often in a context where one neglects pragmatism in favor of moral idealism.