Reproducing sexually must improve an individual´s reproductive success or else sex would not persist... It is increasingly hard to understand how human beings came to be so clever without considering sexual competition. Matt Ridley
Microeconomics and macroeconomics are closely intertwined. Because changes in the overall economy arise from the decisions of millions of individuals, it is impossible to understand macroeconomic developments without considering the associated microeconomic decisions. Greg Mankiw
Is human nature basically good or evil? No economist can embark upon his profession without considering this question, and yet they all seem to. And they all seem to think human nature is basically good, or they wouldn't be surprised by the effects of deregulation. Jane Smiley
People commonly educate their children as they build their houses, according to some plan they think beautiful, without considering whether it is suited to the purposes for which they are designed. Lady Mary Wortley Montagu
Physiology seeks to derive the processes in our own nervous system from general physical forces, without considering whether these processes are or are not accompanied by processes of consciousness. Wilhelm Wundt
A good businessman never makes a contract unless he's sure he can carry it through, yet every fool on earth is perfectly willing to sign a marriage contract without considering whether he can live up to it or not. Dalton Trumbo