notlamb; Although one should look at every case individually; however, I will state the following. Unless the husband is a terrible person, the general rule is that ultimately the wife is the key to the Shalom Bayis. The woman possesses the power to steer the relationship in a positive direction, get the husband into it as well. If she has the wisdom to do this is another matter.
Chachmos Nashim Bansoh Boiso etc… look up the end of the pasuk as well, scary but true.