How it assembled itself
The Heartland is not a county list; it is the interior agricultural economy that drained land, railroads and a handful of families assembled between 1880 and 1960, and that outside capital is now taking apart and reassembling. The map's timeline begins with cattle drives paid in Spanish gold at Punta Rassa and ends with solar centers named for ladybugs and grapefruit that exist so far only in a utility filing [FLMR][TYSP].
Rails, canals and the first assembly, 1880 to 1929
Hamilton Disston's 1881 purchase of four million acres at 25 cents an acre, reported at the time as the largest land purchase ever made by a single person, connects Lake Okeechobee to the Caloosahatchee and opens the interior [WDIS]. The Florida Southern Railway's first train to Punta Gorda in July 1886 creates or transforms Fort Meade, Bowling Green, Wauchula, Zolfo Springs and Arcadia within a single year; the Atlantic Coast Line's Haines City Branch of 1912 does the same for Avon Park, Sebring and Frostproof; the Florida East Coast's Kissimmee Valley Line creates Okeechobee in 1915 and reaches the muck at Belle Glade by 1923 [WFSR][WHCB][WKVL]. The Everglades Drainage District digs five canals to the Atlantic from 1907, and by 1922 Canal Point holds 800 of the 900 sugarcane acres in the Glades [PBCH3][PBCH1]. The hurricanes of 1926 and 1928 kill more than 3,000 people at Moore Haven and around Belle Glade, and the Herbert Hoover Dike, built 1932 to 1938, becomes the wall the whole southern economy leans on [WHHD][BGH]. The map holds 9 operating region companies in 1930.
The corporate era, 1931 to 1989
Charles Stewart Mott buys the Southern Sugar wreck in 1931 and U.S. Sugar's first harvest cuts 292,228 tons of cane the next year [USSH][JMFS]. The Everglades Agricultural Area is drawn under the 1948 flood control project; the 1949 fence law closes the open range; the Range Cattle station at Ona (1941) and the stations at Belle Glade (1921) and Canal Point (1920) put science under the pastures and the muck [WEAA][IFASCR][RCREC][EREC][ARSCP]. When Cuba closes in 1960, the Fanjul family lands at Pahokee with 4,000 acres and dismantled Louisiana mills, George Wedgworth charters the growers cooperative because the existing mills will not take more cane, and the freezes of 1962 through 1989 push commercial citrus south of Interstate 4 into Highlands, Hardee and DeSoto [ENCFC][FPGW][FDPI]. Ben Hill Griffin Jr takes control of Alico in 1972; the dairies concentrate at Okeechobee until the 1987 Dairy Rule buys eighteen of them out [WBHG][WUFT26]. The map holds 29 operating region companies in 1970.
The unwinding and the rework, 1990 to 2026
Talisman's 50,960 acres go to the state in 1999 and U.S. Sugar's 26,800 in 2010; the EAA reservoir now rises on that land [SB10][BNO10][SFWMDE]. Citrus greening arrives in 2005 and production falls more than 90 percent; the module's check columns show parcel groves exceeding surveyed commercial citrus in every county, 47,926 acres apart in Highlands alone, the grove to pasture conversion in a single table [INVSP][MOD][NASS24]. Alico winds down its citrus division after the 2024 to 2025 harvest [ALPR25]. FPL's first solar plant rises on 361 DeSoto acres in 2009 with a president in attendance; by January 2025 fifteen centers run in three counties, and the 2026 plan announces eighteen more [FPLD][OBAMA][TYSP]. Against the conversion runs a counterflow of easements under the 2021 corridor act, on Lykes land, on Blue Head, on a dead grove at Lake Placid [FLGOV21][SEAGL][DEPBH][HNSLP]. The map holds 93 operating region companies at the cutoff.