There are many reasons why marriages can lead to divorce, including but not limited to: 1. Lack of communication: Effective communication is key to a successful marriage, and when communication breaks down, it can lead to misunderstandings, arguments, and ultimately divorce. 2. Infidelity: Cheating can be a major betrayal in a marriage and can lead to a breakdown of trust that is often difficult to repair. 3. Financial issues: Money problems can create tension and stress in a marriage, leading to conflict and ultimately divorce.