Death Through Adam, Life Through Christ

12 Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all people, because all sinned—

Read Romans 5:12 Using Other Translations

Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:
Therefore, just as sin came into the world through one man, and death through sin, and so death spread to all men because all sinned--
When Adam sinned, sin entered the world. Adam’s sin brought death, so death spread to everyone, for everyone sinned.