The first mentions of HTN were in 6th Century BC. Scientists coined the term ESSENTIAL HTN, as they thought that the BP elevation was essential for survival when some patients had vascular disease. The first ever elevated blood pressure in a patient without kidney disease was reported by Frederick Mahomed in late 1800s.
The most interesting fact is that the keeping your BP<140/90 has no evidence basis. It came from an insurance agent representative who noticed that patients with BP >140/90 were dying earlier.