Who created the concept of a social contract

The answer would be, Thomas Hobbes. hope this helps!

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

john smith was the first englishman to sail around the world. francis bacon served as attorney general and lord chancellor of england. he took up aristotelian ideas, arguing for an empirical, inductive approach, known as the scientific method, which is the foundation of modern scientific inquiry.