First mentioned in the 18th century by Scottish philosopher David Hume, utilitarianism is a moral doctrine that is increasingly influential in recent times.
Utilitarianism is not based on utility, but the intrinsic value of something based on pleasure or happiness, or both.
A screwdriver has an instrumental value, as it is useful while doing carpentry or repair work, but it does not provide any pleasure or happiness.
A red rose provides both pleasure and happiness, which is why it has an intrinsic value.