Should People Have Fewer Babies Because of Overpopulation?

Questions about how Christians should regard the argument that the family structure should change and we should have fewer babies since the world is overpopulated, and whether charitable works like feeding the poor are acts of justice as well as love. How should Christians regard the argument that the family structure should change and we should have fewer babies since the world is overpopulated? Are charitable works like feeding the poor and rescuing victims of abuse acts of justice as well as love?