It's the age of counterbalancing through diplomacy and securing the borders of a nation. Essentially this occured within Europe in the later nineteenth century.
The Renaissance Age was th age after the Middle ages.
Ages and ages and ages means a really long time.
A couple of alternatives would be 'eons' or 'millenia'
As long as there are teeth, and for as many children, the teeth in every mouth should be cleaned! With baking soda.
For women, 35 to 45. For men, 45 to 55.