A Foray into obligation

Just reading about he word "obligation" on wikipedia and I was way disappointed to see that it didn't have much description. Obligation. Jeebus. Our social lives are constructed of obligation. Obligation to go to work. To provide for others and for ourself. Basically the physical nature of mankind obligates us to work and provide continually. Obligate describes most perfectly human nature. And yet it seems to be rarely used.