Understanding historical macroevolutionary dynamics shed the light on the controversy of whether evolution follows deterministic pathways or is driven by stochastic events, and will provide insight into the evolutionary processes that influence the community assembly. Here, we examine the evolution of the hyperdiverse ant genus Strumigenys in Fiji archipelagoes with a comparative phylogeographic perspective by using RADseq data. Our results revealed the history of Strumigenys species that colonized to Fiji in Miocene (10.5-7.5 Ma), following by two independent radiations across the whole archipelagoes, leading to the emergence of 11 endemic species with different level of ecological niche shift and morphological shift. Our results support the idea of deterministic macroevolutionary processes that drive the diversity dynamic of ants in Fiji.