“A goal of this book has been to tear down in some small part these barriers to understanding by attempting to shatter the “divinity of arithmetic,” through showing that even the methods, which we now take most for granted, were not given to us from on high, but were actually the result of centuries of scientific efforts on the part of our predecessors. p. 269” HistoryMankindMathArithmetic Book:How Math Works: A Guide to Grade School Arithmetic for Parents and Teachers Source: How Math Works: A Guide to Grade School Arithmetic for Parents and Teachers