It is true, there was no public-school system, and the reason for it was very plain. The wealth of the upper classes enabled them to have private tutors. ↗
As the world's sole remaining super power and economic powerhouses, our nation's ability to be at the forefront of innovation and production has enabled unparalleled economic success of our nation's workforce. ↗
The particular features of the photographic method of detecting atomic particles enabled us to establish the existence of transient forms of matter which had escaped recognition by other methods. ↗