Reform is the largest Jewish denomination in the United States by self-identification, generally found by survey to account for around a third of American Jewish adults, with Conservative Judaism somewhat smaller and Orthodoxy smaller still but younger. Its progressive relatives are the largest non-Orthodox presence in Britain, and the World Union for Progressive Judaism claims member congregations across some fifty countries.
In Israel the position is quite different. Progressive and Masorti Judaism together are a small minority with limited state recognition; their rabbis are not funded as Orthodox rabbis are, their conversions are not accepted by the rabbinate for marriage, and the long dispute over an egalitarian prayer section at the Western Wall, agreed by the government in 2016, frozen in 2017, and unresolved since, has become the symbolic centre of the argument about whether non-Orthodox Judaism has standing in the Jewish state. Israeli courts have repeatedly ruled in the movements' favour on specific points; implementation has repeatedly stalled.
The movement's difficulty is not doctrinal but demographic. Surveys consistently find that Reform Jews marry non-Jews at high rates, that transmission of Jewish identity across generations is weaker than in the more observant movements, and that the median age of Reform congregants is rising. The movement's own answer is that the alternative was not a more observant Judaism but no Judaism, and that patrilineal descent and the welcome of interfaith families have retained people who would otherwise have been lost entirely. Critics answer that the retention is nominal. The data are compatible with both readings, which is why the argument continues.
What is not disputed is the movement's public record on social action, where it has been among the most visible religious voices in American civil rights, refugee and church-state litigation for three generations.