Namely, The Investigative Judgment, a doctrine wholly derived from "a charismatic prophetic leader" and not found anywhere in Scripture, here:
"The Adventists grew out of the millenarian fervor that swept the United States in the 1840s. In 1844, William Miller warned of the Christ’s imminent return and the world’s destruction. In fact, he did so twice, and the double failure provoked what is termed the Great Disappointment. A remnant of Millerites then reconstructed their movement under the visionary leadership of New England–born Ellen G. White."
Seventh-day Adventism is a failed apocalyptic cult, not unlike Christianity itself.
The apple doesn't fall far from the tree. By their fruit ye shall know them. "Does a spring pour forth from the same opening fresh water and brackish?" -- James 3:11
Phil Jenkins should know better, but practices a form of political correctness all too characteristic of the contemporary academic community by not addressing Seventh-day Adventism's raison d'être. Too prickly no doubt for The Christian Century, and for his career. So much for thinking critically, living faithfully.
The religion of Ben Carson does no real harm in the world, except insofar as its adherents are occasionally no better than your average criminal, which Jenkins does mention. Thank God for small favors, I suppose.
But Adventism is still nuts.