Both Italy and Prussia-Germany were united from the years 1870-1871. Instead of small provinces, the country became united under one political leadership. Their unification received the help of France and from the Austro-Hungarians backing off their claims. Italy formed a Royal Navy, increased industrial output and worked towards internal reforms.
The internal improvements failed to raise them to the status of a world power. Relative to the other world powers like Germany and Great Britain, Italy lacked a strong and efficient navy and a standing army. Although Italy had iron and steel industries they were dwarfed by that of their neighboring countries.
Why did Italy's development lag so far behind that of Germany, or other European powers?