Directions: The short passage below is followed by a question based on its content. Answer the question on the basis of what is stated or implied in the passage.
From the wealth of science we have selected certain parts. And our choice has in no way been influenced by a consideration of the higher interests of humanity. It has simply followed the direction of our natural tendencies. The principles of the greatest convenience and of the least effort, the pleasure procured by speed, change, and comfort, and also the need of escaping from ourselves, are the determining factors in the success of new inventions. But no one has ever asked himself how we would stand the enormous acceleration of the rhythm of life resulting from rapid transportation, telegraph, telephone, modern business methods, machines that write and calculate, and those that do all the housekeeping drudgery of former times. The tendency responsible for the universal adoption of the airplane, the automobile, the cinema, the telephone, the radio, and, in the near future, of television, is as natural as that which, in the night of the ages, led our ancestors to drink alcohol. Steam-heated houses, electric lighting, elevators, biological morals, and chemical adulteration of foodstuffs have been accepted solely because those innovations were agreeable and convenient. But no account whatever has been taken of their probable effect on human beings.
What is the theme of the passage?