Explain the root cause of these issues. Discuss how managers of international firms should address these issues. 

The root cause of issues faced by international firms is cultural differences in the workplace. These differences can arise from different approaches to communication, work ethic, problem solving and management styles which can lead to misunderstandings or disagreements between employees. Additionally, language barriers, lack of diversity among staff members, and varying expectations for employee behavior all can contribute to these issues.

Managers of international firms should address these issues proactively by establishing clear policies regarding communication and collaboration between employees as well as encouraging an open dialogue where individuals feel comfortable expressing themselves without fear of judgment. Managers should also strive to create a diverse workplace environment so that everyone feels included regardless of their background or nationality. Furthermore, they must provide training programs that focus on both cultural awareness and conflict resolution skills so that employees are able to recognize potential conflicts before they become too severe.

Finally, managers should be aware of local laws and regulations when operating in foreign countries in order to ensure compliance with all applicable laws. By addressing the source of the problem (cultural differences) directly through effective communication strategies and fostering a supportive workplace culture, managers will be able to reduce friction within their organizations while promoting unity among staff members.