Shared ground
Paul describes a past condition shared by his readers and, in v.3, by Paul himself (“we all”). He calls it being “dead” in relation to “trespasses and sins,” meaning a real spiritual and moral brokenness rather than physical death. This “death” shows up as a settled way of life (“walked”) shaped by more than personal choice: the pattern of “this world” and an unseen ruler/spirit at work in “sons of disobedience.”
The passage also links sin to desire and thought. The old life is portrayed as driven by bodily cravings (“flesh”) and by what “the mind” wants, so the problem is both external pressure and internal impulse. The closing line places this condition under coming wrath and says it was not unique—“even as the rest.”
Where interpretation differs
Some disagreement centers on how to read “dead.” One reading takes it to mean total inability to respond to God without God’s prior action; another takes it as separation and doomed condition that still involves real human agency and responsibility.
Another difference is what to do with “the prince of the powers of the air.” Many read this as a real personal evil ruler behind spiritual opposition; others read it more as a way of describing the oppressive spiritual forces at work in the present “age” (age) without specifying how “personal” that power is.
A third difference is the force of “by nature.” Some take it to mean an inborn condition shared by all humans; others understand it as what people become through a long-formed pattern—so deep and established it can be called “natural.”
Why the disagreement exists
The key phrases are metaphorical or compressed. “Dead” is image-language, and the text does not stop to define whether it implies inability, separation, or both. “Air” (air) and “spirit” language fits an ancient worldview where unseen powers were assumed, but Paul’s phrasing can be read either as identifying a concrete ruler or describing a real but less specified spiritual influence. “By nature” can describe either what is innate or what is characteristic.
What this passage clearly contributes
Explicitly, the passage claims that (1) the readers’ former life was a consistent pattern of sin, (2) that pattern aligned with the direction of “this world,” (3) it also aligned with an unseen ruler/spirit operating in disobedient people, and (4) this condition was shared by “all,” not just one group. Theological inference, but strongly suggested by Paul’s framing, is that human sin is both personal and social and also tied to hostile spiritual powers, and that the “wrath” Paul mentions is the serious outcome attached to that shared human condition (developed further in 2:4–10).