Final answer:
According to Christian doctrine, sin did enter the human race through the disobedience of Adam and Eve as narrated in Genesis 3, with theological perspectives provided by St. Augustine and Irenaeus.
Step-by-step explanation:
The question of whether sin entered the human race through the disobedience of Adam and Eve is a religious concept found in Christian doctrine. According to Genesis 3, Adam and Eve were banished from the Garden of Eden as a result of their disobedience after being deceived by the serpent. This act of eating the forbidden fruit from the tree of knowledge of good and evil is what many Christian teachings consider the original sin, marking the beginning of sin's presence in human existence. This story symbolizes the introduction of sin and mortality into the human condition. St. Augustine and Irenaeus provide theological perspectives on this event. St. Augustine believed that humankind is responsible for evil by being led astray, allowing God to demonstrate divine love through Jesus Christ. Irenaeus considered a teleological view where God is involved in soul-making, aligning with the concept of humans growing from a mere biological life into a state of spiritual life and divine love.