John Wycliffe was an English theologian, philosopher, and church reformer who lived in the 14th century. He is best known for his translation of the Bible into English, making it more accessible to the common people. Wycliffe also criticized the wealth and power of the Catholic Church and advocated for a simpler form of Christianity based on the teachings of the Bible. His ideas and writings laid the groundwork for the Protestant Reformation in the 16th century. Wycliffe's followers, known as Lollards, continued to spread his teachings and influence long after his death.