In a monetary economy, accordingly Keynes, money, as the institution that founds the exchange system, is a link between the present and the future. Indeed, money affects the real economy. However, this has been a controversial issue among economists.
In fact, Keynes warned
“The difficulty lies, not in the new ideas, but in the escaping from the old ones, which ramify, for those brought up as most of us have been, into every corner of our minds” ,
A video on the life, ideas and legacy of Keynes could de found at