$1)$ Why do you believe that promises generally aren't legally binding in American common law?

$2)$ Why do you believe that American common law requires consideration in binding contracts?

$3)$ If promises aren't generally legally binding, are there other risks associated with breaking a promise? What are those risks?

$4)$ Do you believe that promissory estoppel should be an exception to the consideration requirement?

$5)$ Do you believe that some promises should be legally binding? If so$,$ which ones and why?