It would generally be "growth" that focuses on equal opportunities for education, since it is in the best interest of the country in question to have as many educated citizens as possible.
The answer would be flexible in the missing blank.
The Mexican war was justified under the principle of Manifest Destiny <span />
By means of excavations and the study of the areas that lived in as well as the careful study of there remains to study there health and if there where identifiable diseases that they suffered and other things of this nature <span />