Christian Endurance
The book of James is a wonderful book, it is a book to us but when it was written it was considered a letter, and this letter was addressed to the Twelve Tribes of Israel or better described for us to understand the Jews, more importantly the Christian Jews.
The Book of James is possibly the oldest book in the New Testament. This book was written possibly around AD 45, which is before the first council of Jerusalem in AD 50, however, this is an estimate as the exact date is unknown. (https://www.gotquestions.org/Book-of-James.html) [1] The reason for this writing was after the stoning of Stephen, there was great persecution that followed and would have led to a dispersion of Christian Jews. This is given credence by Saul actively seeking Jewish Christians abroad as seen in Acts 9.