In Jacobean England, the main responsibility of a father with a daughter was to secure a good husband for his daughter, and a good husband was a husband who was wealthy and of a respectable social status. In the play, Paris is the man whom Lord Capulet wants his daughter to marry. Paris is related to the Prince and thus occupies a very respectable position in society. He is also very wealthy. By securing such a match for his daughter, Lord Capulet also hopes to secure the position of his family.
Lord Capulet does not care that his daughter, Juliet, does not love Paris. He does not consider love to be a necessary precondition for marriage. When Juliet refuses to marry Paris, Lord Capulet becomes incensed. He tells her that she will obey him, her father, and marry Paris whether she likes it or not, and he says that he will drag her to the church if he has to. In his fury, he calls her a "disobedient wretch" and "green-sickness carrion," and he threatens to disown her.
In Lord Capulet's reaction to his daughter's refusal to marry Paris, we can see that he considers marriage as first and foremost a social contract, as much or more for his own gain than for his daughter's. This impacts his daughter, Juliet, because she must endure the wrath of her father and face the possibility of being disowned and disgraced by him. She must also face the possibility of being forced into marrying a man that she does not love, which in turn would disgrace her relationship with the man (Romeo) whom she does love.