Shared ground
Genesis 6:11–12 gives a blunt diagnosis of the world’s condition right before the flood story turns to God’s decision and instructions to Noah. The repeated focus on “the earth” presents the problem as widespread, not a small pocket of wrongdoing.
The text makes two linked claims about what this widespread problem looks like: the earth is “corrupt” and it is “filled with violence.” Corruption is described “before God,” meaning the situation is evaluated in God’s presence and under God’s gaze, not merely by human opinion.
The passage also stresses God’s awareness: God “saw” the earth and the narrator repeats the verdict. God’s seeing is not just noticing facts; it functions as confirmation that the moral assessment is accurate.
Where interpretation differs (only where needed)
How wide is “the earth”? Some read “the earth” as the entire world. Others read it as the human world as then known (the inhabited land), with the language still intentionally sweeping.
Who is included in “all flesh”? Some take “all flesh” mainly as humanity (since the focus is moral corruption and violence). Others think it may include non-human creatures in the scope of “flesh,” at least in the sense that the corruption has spread through the whole living order connected to human life on the earth.
What is emphasized by “corrupt”? Some emphasize inner moral decay (a breakdown of what is right). Others emphasize social collapse (a breakdown of community life), especially since “violence” is highlighted as what fills the earth.
Why the disagreement exists
The key phrases are deliberately broad. Words like “earth” and “all flesh” can be used in more than one range (global vs. the inhabited realm; humans specifically vs. living creatures more generally). Also, the pairing of “corrupt” with “violence” can be read as cause-and-effect (corruption produces violence) or as two complementary descriptions of one reality.
What this passage clearly contributes
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Explicit claim: The earth is corrupt in God’s sight and saturated with violence.
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Explicit claim: God sees and confirms this condition; the corruption is not hidden.
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Explicit claim: The reason given is sweeping: “all flesh” has corrupted its “way” (its pattern of life) on the earth.
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Theological inference (from these claims within the flood lead-up): the coming flood narrative is framed as a response to a world-scale moral and social ruin rather than a random catastrophe. (This inference is reinforced immediately after in Genesis 6:13.)