I believe the answer is last 50 years
Even though organized promotion of public health just started to gained international recognition in the last decades due to international conference done by who
the first organized promotion for public health already exist in 1946 since CDC was first established.
Answer:
The resolution of the nullification crisis in favor of the federal government helped to undermine the nullification doctrine, the constitutional theory that upheld the right of states to nullify federal acts within their boundaries.
Loyalists? because they were loyal to the ruler and had all the benefits