Love is everywhere in Little Women, a novel about four marriageable sisters and their various friends. Often it is romantic love, either reciprocated or unrequited. But there are many other kinds of love that sustain the characters, and it's even suggested that they could substitute for romantic love if necessary. These other forms of love include the different bonds of family, especially parent to child and sisters to each other. They also include more abstract affections, such as the love of country (patriotism) or the love of God (religion). Love is able to sweeten almost any sour situation, from poverty to loss to loneliness, and nothing can compensate for the lack of love.
Because the March girls have the strong foundation of their mother's love, they are able to make intelligent choices when faced with different prospects for romantic love.
Little Women suggests that love between siblings, especially sisters, is more important than romantic love.