What were Prussia's resources?

Answer 1

The answer depends on the period you have in mind. Before the annexation of Silesia (definitive from 1763 onwards), Prussia had little apart its population - and some forests. Much of its agricultural land was not very good. Later Prussia acquired coalfields in Silesia and the Rhineland and good agricultural land. It also developed a first-rate education system. It was the first large European country to enforce compulsory education up to age 14. (This took effect in 1825). Prussia was traditionally keen to attract talent. It allowed a large number of French Huguenots to settle in its territory and later it was one of the Germany states that was fairly tolerant towards Jews, thus attracting Jews migrating from less tolerant states. People remained the key resource.