Make birth control, especially “the pill,” widely available.
Frighten teenagers away from having children after high school through mandatory “sex education” classes.
Promote feminism so that women put careers or hedonistic pursuits over having children, or develop such negative attitudes or unrealistic expectations towards men that they are incapable of making the compromises necessary to be in a long-term relationship with a man.
In the mass media, continually depict sex as a recreational, rather than procreational, activity.
Promote homosexuality and other sexually aberrant behaviors that won’t result in pregnancy (such as anal sex between heterosexuals).
Degrade the institution of marriage by allowing easy divorces and same-sex marriage, and by making divorce proceedings so grossly unfair towards men that few will want to marry.
Legalize hardcore pornography; flood society with porn so that men end up preferring masturbation over actually finding a mate to have children with. Make sure that the majority of hardcore porn emphasizes anal sex over normal heterosexual intercourse which could lead to pregnancy.
Feed male babies soy formula and other oestrogenic substances so that their reproductive systems don’t develop normally, making them unable to reproduce.
To reduce fertility, encourage a nutritionally-poor diet in which white flour, refined sugar, and processed vegetable oils account for most of the calories.
To reduce fertility, encourage a vegetarian diet, especially one in which unfermented soy products are the principal source of protein.
To reduce fertility, encourage people, especially teens and young adults, to take illicit drugs, as well as smoke and regularly abuse alcohol.