You need a work ethic and stable government among other things to achieve dominance.
You really should do research before you make wild assertions. Do you know anything about Spanish history or history at all? The gradual death of the of the spanish had little or nothing to do with work ethic or stable government.
Here are some things that were the cause.
Reformation and extremist Catholicism.
European wars.
Ottoman empire.
european royalty and succesions
inflation caused by bullion from Americas.
independence movements in the Americas.
Maybe you don't understand what life was like for the majority of people in Europe in that time period. If you wanted to eat, you worked hard. If you wanted to live, you did what the rulers and the church told you to. The regular people had no choices.
Spanish governments were no more or less stable than any other European power. England also had changes in dynasties. They even executed their king. Surprisingly they became the next world power.
My point is you should know what you are talking about before make wild ass comments.
P.S.
If you would like to know source for the above facts, let me know. I can check my books for you. Also, I bet if you do a google search on the subject you might find some reputable sites that will discuss the subject.
Facts don't lie or have an agenda. Facts are just facts