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We became sinners, not because God imposed(imputed) sin to us, nor because we inherited sin and guilt from Adam, ONLY because we inherit a mortal nature from Adam. We sin because we are mortal. And that righteousness of Christ made all men alive again as well. From Adam (death/mortality) to Christ (life). Rom 5:18, I Cor 15:22, John 6:39, all state that the equation is always death to life. It never speaks of Adam's sin or our supposedly inherited sin and guilt, or even death imposed by God. Christ overcame death the power of Satan, Heb 2:14-17.
19 For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.