What is law of self interest

Which of harriet martineau’s books is a foundational treatise on sociological data collection?

Match the description to the term. 1. ancient people of the british isles normans 2. possible location of oldest known writing emigrate 3. a variety of a language celts 4. the study of word forms indus valley 5. to leave one's country morphology 6. invaded england in a.d. 1066 dialect

Indian scholars invented all of the following that we use today except .