The history of Pentecostalism is a rich and complex narrative, emerging from the late 19th and early 20th centuries. Its roots lie in the Holiness movement, which emphasized personal holiness and a "second blessing" experience following conversion. This movement paved the way for Pentecostalism's distinctive focus on spiritual gifts, particularly speaking in tongues, divine healing, and prophecy.

The spark that ignited the Pentecostal movement is widely recognized as the Azusa Street Revival in Los Angeles, California, from 1906 to 1909. Led by African American pastor William J. Seymour, this revival drew diverse crowds who experienced ecstatic worship, interracial fellowship, and miraculous events. The Azusa Street Revival became a global epicenter, spreading Pentecostalism to various parts of the world.

Early Pentecostalism faced both enthusiasm and opposition. Itinerant preachers and missionaries played a crucial role in disseminating the Pentecostal message across cultural and denominational boundaries. New Pentecostal denominations and networks emerged, each with its unique theological nuances and organizational structures. Some established denominations also experienced Pentecostal renewal movements within their ranks.

Pentecostalism's impact on global Christianity has been profound. It has reshaped worship styles, emphasizing spontaneity and emotional expression. Its emphasis on spiritual gifts has led to a renewed interest in divine healing and supernatural encounters. Pentecostalism has also contributed significantly to the growth of Christianity in the Global South, particularly in Africa, Latin America, and Asia.

Today, Pentecostalism is one of the fastest-growing segments of Christianity, with diverse expressions ranging from classical Pentecostal denominations to charismatic movements within mainline churches. Its emphasis on personal experience, spiritual empowerment, and social engagement continues to shape the religious landscape worldwide.