Introduction:A “nuclear family” is a family composed of a working father, a housewife mother and one or more children (Brym, 2014, pp. 22). And although the ideal family life was pleasant, it did not last long. Over the last thirty years there has been an acceptance of the deviations of a family unit. The definition of family has changed and according to our notes a family is a relationship in which people live together with the commitment to form an economic unit to take care of one or more children. People involved in the family believe that their identity is significantly linked to the group. Through literature reviews and personal experiences, this essay will demonstrate that nuclear families are now an outdated institution but the idea of ​​family still exists in different forms. Examples of these variations allow children to have common-law parents, same-sex parents, divorced parents, single-parent families, adoptive parents, and foster parents. Literature Review: According to our notes, marriage is the marital union in a legal form. Previously only opposite-gender couples were visible, whereas now same-sex couples are very common (Trost, 2010, pp. 512). In Canada, same-sex marriages were legalized in 2005 and are becoming popular and accepted. In the last century, the dominant family type consisted of a married couple as the core unit and biological children, who formed the ideal-typical nuclear family unit. This is changing, and for the first time in 2010, married couples made up less than half of all North American households (Farrell et all, 2012, pp. 297). In an experiment on young people's views on family dynamics, young people are conflicted over whether their parents should stay together. A small majority would like parents who have separated to stay together. However, nearly half concluded that parental separation was better than living