Randy, the libertarian:
The basic standard of what is permissible and impermissible is non-interference rights .

Libby, the egalitarian liberal:
Everybody has basic human rights, including a mix of non-interference rights, political participation rights, and some social and economic rights to assistance from society.

Eudora, the oldest child (a college student).
A "general" utilitarian, she holds people should choose the act or policy, out of the available options, that is likely to produce the greatest happiness (when all the positive and negative effects of the options on everyone affected are included in the calculation)

Allison, slightly younger.
An "altruist," she holds that persons should choose the option that is likely to produce the greatest happiness < . . . > except that the decision-maker should not include the likely positive or negative impact on herself.

Colleen, younger than Allison.
A "collective egoist," she holds each person should choose the option likely to produce the greatest happiness when all positive and negative impacts on everyone in her group are considered. The chooser's "group" may not include all those affected.

Percy, the baby of the family (who is old enough to have opinions of his own).
A "personal egoist," Percy wants everyone to choose the option that is likely to maximize his own (i.e., Percy's) total happiness.

Ernie, the "ethical egoist," older than Percy but younger than Colleen.
Ernie holds that everyone should choose in such a way as to maximize his or her own self-interest. (Ernie's approach requires people to consider the options and include the probable positive and negative results in their reasoning; however, these results are only those that affect the interests of the person making the choice.)

Hedda Eudora Kahn-Sequenz, the mother.
A hedonistic utilitarian, she follows the general utilitarian approach [See Eudora] but understands happiness as pleasure and its opposite as pain.

Presley Kahn-Sequenz, the father.
A preference utilitarian, he follows the general utilitarian approach [See Eudora] but understands happiness as satisfaction of preferences and its opposite as frustration of preferences (=occurrence of what people prefer not to happen).