The term was popularized by the media shortly after a press conference given on June 18, 1971, by President Richard Nixon—the day after publication of a special message from President Nixon to the Congress on Drug Abuse Prevention and Control—during which he declared drug abuse "public enemy number one”
Umm if u look it up it’s Richard Nixon-
Droughts and severe winters were the main problems facing western cattle barons
Natives lost control of land and independence, expanded population which resulted in famine, cash crops-displaced the food crops, which resulted in famine, natives died of new diseases like smallpox, thousands of people died because of rebellions
I believe the answer is: positive externality
Positive externality refers to The benefit that enjoyed by a third party when the first and second party are conducting a transaction.
When you receive a vaccines, you prevent yourself from becoming a host that could contaminate other people from getting the virus. In the example above, you and your children are the first and second party. And other children are the third party.
