1.
Infrastructure is destiny in retail. Walmart's 1.8% supply chain advantage over Kmart was the difference between life and death.
2.
Adjacencies kill focus. Every dollar Kmart spent on bookstores was a dollar not spent fixing their core business.
3.
You can't cost-cut your way to competitiveness. Kmart slashed circulars to save money, customers stopped coming, and the death spiral began.