From approximately 1900, Pentecostal and evangelical movements emerged as transformative forces within global Christianity, fundamentally reshaping the religious landscape of the twentieth century. These movements gained significant momentum through a shared emphasis on personal conversion, the authority of scripture, and the active experience of the Holy Spirit. By prioritising direct engagement with the faith, they successfully transcended traditional denominational boundaries and established a widespread presence that resonated across diverse cultural and social contexts.

The rapid expansion of these movements was propelled by several interconnected factors that allowed them to flourish in both urban and rural environments. Key drivers of this growth included:

• A strong emphasis on revivalism and charismatic worship practices.
• The active role of lay preaching, which empowered ordinary believers to lead and evangelise.
• The prominence of healing ministries and prayer for the sick.
• The strategic use of modern media and communication technologies to disseminate messages.
• The impact of global migration patterns, which facilitated the spread of these traditions to new regions.

The appeal of Pentecostalism and evangelicalism proved particularly potent in parts of Africa, Latin America, and Asia, where these movements often provided a sense of community and spiritual vitality in rapidly changing societies. By adapting to local customs while maintaining a core theological identity, these groups were able to establish deep roots in regions that had previously been dominated by other religious traditions or secular ideologies. This adaptability remains a hallmark of their continued influence on the global stage.

As these movements matured throughout the century, they evolved into sophisticated networks that transcended national borders. The focus on individual testimony and the promise of a personal encounter with the divine helped to foster a sense of global belonging among adherents. This sense of connection, supported by international missionary efforts and the exchange of theological ideas, ensured that Pentecostal and evangelical Christianity became one of the most dynamic and visible expressions of faith in the modern era.