Marketing Myopia by Theodore Levitt argues that companies focus too much on their products instead of understanding customers' needs. He asserts there are no growth industries, only growth opportunities. When companies define themselves by their products rather than by the customer needs they meet, they risk becoming obsolete. Levitt provides examples of once dominant industries like railroads and movies that declined due to a failure to adapt to changing customer demands. He encourages companies to take a broader view of their industry and role in satisfying customer needs to sustain long term growth.