Here is what the great Bishop John McEvilly says
**Author of.—**Who is the St. James to whom this Epistle is attributed? There were two, who bore the name of James, mentioned among the Apostles—one, the son of Zebedee, and brother of St. John; he was put to death by Herod (Acts 12) He is called James the Greater. The other frequently styled in Scripture the brother of our Lord, was the son of Alpheus, also called Cleophas, and of Mary, the cousin, although in SS. Scripture, frequently called the sister, of the Blessed Virgin. He was the brother of St. Jude and of Joseph, called the Just. To distinguish him from the other James, he is called James the Less, a title bestowed upon him, either on account of his age, or the lowness of his stature, or, from being called later to the Apostleship. He is also styled James, the Just, a title which it is universally agreed, he merited, owing to his eminent sanctity, so generally recognized, that it procured for him the singular veneration of the Jews themselves, by whom he was called “the just man.” To his death Josephus attributes the final destruction of Jerusalem and the total dispersion of the Jews. The true cause, Josephus appeared, or at least affected, not to understand, viz., the murder of the Son of God, whose blood they invoked on themselves and on their children. Saints Jerome and Epiphanius relate, that our Lord, at his ascension, recommended to St. James the Church of Jerusalem, of which city he was, in consequence, constituted first Bishop, by the other Apostles, He was a Nazarite, never drank wine, and was particularly distinguished for his love of prayer. Ananias the son of Annas, of whom mention is made in the Gospels, being High Priest about the year 60, when St. Paul had appealed to Caesar, having assembled the Sanhedrim, summoned St. James before them. Josephus narrates, that he was accused of violating the laws, and handed over to the people to be stoned to death. Hegesippus adds, that they compelled him to be carried to the battlements of the temple, and would fain have compelled him to make a public renunciation of his faith in Christ; but St. James took this public opportunity of proclaiming the Divinity of Jesus Christ, He was, in consequence, hurled from the battlements, and after his fall, dispatched by a blow from a fuller’s club. This occurred in the year 62. This latter St. James, and not James the Greater, is the author of this Epistle, the best proof of which is, that in it, the inspired writer undertakes the refutation of errors which did not exist at the time St. James the Greater was put to death by Herod about the year 42, full fifteen years before St, Paul had written his Epistle to the Romans. The error referred to, which this Epistle is principally employed in refuting, was occasioned by the false interpretation of certain passages of St, Paul to the Romans, From these passages some persons inferred the absolute inutility of good works, without which St. James here clearly points out that faith is dead, and salvation, unattainable; he delivers also many other precepts of a holy life.