What is the theme of Iron and Silk by Mark?

In Iron and Silk, Mark sets the theme of change and transformation to explore how the lives and identities of people are shaped and reshaped by political and social events, personal choices, and the relentless passage of time. The overarching theme of change is reflected through various narratives, including the political upheaval in Vietnam during the French colonization, the journey of individuals and families across continents, and the evolution of relationships between characters over years and decades.