Greek storgē (στοργή) — natural family affection, especially the love of parent for child and the bonds that arise from kinship. Though the noun itself is rare in the NT, the compound philostorgos ("devoted, tenderly affectionate") appears in Romans 12:10, and the compound astorgos ("without natural affection") appears in Romans 1:31 and 2 Timothy 3:3. C. S. Lewis popularized the four-Greek-loves framework (agape, phileō/philia, eros, storge) in his book The Four Loves (1960).
Storge is the most commonplace love — so natural it is usually beneath conscious notice. A mother nursing her baby, a father teaching his son to throw, siblings chasing each other in the yard, a grandfather's hand on a small head. It is the love that "just happens" when blood or long familiarity binds people. It requires no agreement, no shared interests, no admirable qualities — merely shared life. The NT sounds an alarm when a culture loses storge. Romans 1:31 lists astorgos — "without natural affection" — as a symptom of a society under God's judgment for idolatry. 2 Timothy 3:3 gives the same diagnosis for the last days. When mothers abort babies, when fathers abandon children, when siblings sue each other into ruin, when a civilization stops caring for the elderly — that is astorgos. The recovery of storge is a sign of reformation. It costs nothing but cannot be faked. Honor your parents; love your siblings; cherish your children; feel your bond with kin — and you fulfill storge.