Why future warship designs usually evolve

What ships should a modern Spanish Navy order over a seventy-five-year planning horizon?

The exact ships cannot be forecast, but naval designs generally evolve from proven hulls, with new systems introduced incrementally rather than through clean-sheet leaps.

Navies are described as institutionally conservative because most successful designs evolve from tested predecessors. Dreadnought-era layouts grew from earlier armored-cruiser experiments, while the proposed Type 32 was expected to adapt the Type 31 hull for unmanned air, surface, and underwater vehicles. Proven hulls reduce technical uncertainty and make an ambitious proposal easier to fund because designers and governments can isolate what is genuinely new.