criticisms of act utilitarianism

reason, motive or intention of an action

the real source of an action’s moral worth not its outcome or consequence.

subjectivity

the usefulness / experience of a particular pursuit of pleasure differs from person to person.

comparing pleasures

different people can’t compare whether their experience of pleasure is the same as someone else’s

most pleasurable things lack a common currency with other pleasurable things.

social engineering

best method of achieving utilitarianism but would involve diminishing human autonomy and freedom.