A Creed For The Third Millennium by Colleen McCullough

Set in a dystopian future plagued by environmental and societal collapse, the story follows Dr. Joshua Christian, a charismatic psychologist chosen by the government to inspire hope and unity among a disillusioned population. As he rises to prominence, he becomes a messianic figure, embodying the ideals of a new creed meant to guide humanity through its crises. However, the immense pressure and manipulation from those in power lead to personal and ethical dilemmas, ultimately questioning the cost of leadership and the true nature of salvation in a fractured world.