The interpretation timeline
James 3:16 Douay-Rheims

For where envying and contention is, there is inconstancy, and every evil work.

A.D. 407 – 1871 3 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“Let us cleanse the eyes of our souls of all filth. For just as filth and mud blind the eyes of the flesh, so too worldly concerns and discussions about moneymaking can dull the hearing of our minds more effectively than any filth, and not only corrupt them but do wicked things as well.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“For where envying and strife is,.... Where these are cherished in the heart, and especially where they break out into action, in families, neighbourhoods, states, or churches: there is confusion and every evil work; these occasion disturbances, raise uneasiness, make disquietude, and cause tumults whenever they appear; and put persons upon doing everything that is wicked, to gratify such insatiable lusts.”
Source
1871
A.D.
1871
“envying--So English Version translates the Greek, which usually means "zeal"; "emulation," in Rom 13:13. "The envious man stands in his own light. He thinks his candle cannot shine in the presence of another's sun. He aims directly at men, obliquely at God, who makes men to differ." strife--rivalry [ALFORD]. confusion--literally, "tumultuous anarchy": both in society (translated "commotions," Luk 21:9; "tumults," Co2 6:5), and in the individual mind; in contrast to the "peaceable" composure of true "wisdom," Jam 3:17. James does not honor such effects of this earthly wisdom with the name "fruit," as he does in the case of the wisdom from above. Jam 3:18; compare Gal 5:19-22, "works of the flesh . . . fruit of the Spirit."”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.