Western scientific
Sociology of religion / secularisation
The classical secularisation thesis (Weber, Berger) survives in Western Europe and the Anglosphere: rising education and prosperity correlate with declining religious affiliation. The thesis failed globally because the data is regional: Latin America saw Pentecostalisation, Africa saw expansion, the Middle East saw re-Islamisation. There is no single global story.
Pippa Norris & Ronald Inglehart, Sacred and Secular; Pew Religious Landscape
Critical
Religious-nationalism critical analysis
What looks like a 'religious revival' in many countries is more precisely the political instrumentalisation of religion. RSS Hindutva in India, Christian Nationalism in the US, Russian Orthodoxy as state ideology, Religious Zionism, Iranian Velayat-e Faqih. Theologically these movements are often shallow; politically they are decisive.
Anne Stensvold, Religious Nationalism; Atalia Omer, Religious Nationalism
Religious
Christian theological
From within the Christian traditions, the picture is the slow decline of cultural Christianity and the somewhat-tougher persistence of practising Christianity. Many Western churches are smaller but the people in them attend more. The mainline-to-evangelical shift in the US has plateaued; the Pentecostal expansion globally has not.
Diana Butler Bass, Christianity After Religion; David Goodhew
Religious
Islamic theological
The most populous Muslim-majority countries (Indonesia, Pakistan, Bangladesh) report stable-to-rising religious salience. Within the Muslim world there is a contested split between Salafi/Wahhabi conservatism, the modernising Indonesian Nahdlatul Ulama tradition, the Iranian theocratic experiment, and the Turkish AKP synthesis. The future of Islamic political identity is being negotiated, not declining.
Shadi Hamid, Islamic Exceptionalism; Nahdlatul Ulama statements
Eastern contemplative
Buddhist / Hindu / Confucian
The dharmic traditions don't map onto 'religion' as Western survey instruments use the term. The Hindutva politicisation of Hinduism, the Buddhist nationalism of Myanmar and Sri Lanka, and the East-Asian Confucian-modernist syntheses each require different analytical frameworks. Treating them as instances of the same global story flattens what is meaningful about them.
Romila Thapar; Anne Blackburn; Tu Weiming
Indigenous
Indigenous cosmologies
Indigenous traditions are typically not called 'religion' by their practitioners; they are cosmologies that bind humans to land, ancestors, and non-human kin. The modern revival of these, at scale and with state recognition, is one of the meaningful religious developments of the 21st century, and it sits outside the secularisation-vs-revival frame entirely.
Robin Wall Kimmerer; Vine Deloria Jr., God is Red
Critical
Anti-theist / critical
Religion's net contribution to the present moment is best assessed by its political effects: blasphemy enforcement, minority persecution, religious-nationalist mobilisation. From this perspective, the rise of the unaffiliated is one of the few clearly positive trends, especially where it is paired with civic-association alternatives.
Bertrand Russell, Why I am Not a Christian (1927); contemporary humanist critique