Empty nest

Another abandoned farmhouse in Adams County, Pennsylvania.  I encountered two such empty farmhouses within a quarter mile of one another on the same road.  It makes me wonder what happened. 

Technical details:
Bronica SQ-A medium format film camera with a Bronica Zenzanon 150mm lens.  
Kodak Tri-X 400 ISO B&W film, shot at ISO 320.
1/30th second at F22.
Developed in Adox Rodinal 1:50 dilution for 9 minutes, 20 seconds @ 20 degrees Celsius in Pattern 3 reel tank using hand inversions.  
120 negative scanned with Epson V600.