Reportedly, in the last several years agriculture (farming) stopped being the dominant trade. Less than 50% of the world's working population has been involved in agriculture for some time now (I think this milestone has been achieved in the second half of the XX century, but not sure about the decade). Now the service sector has overpassed it in the number of people employed. [pdf] Division is: agriculture, industry, services.
Percent of people employed in:
Of course, the developed world ("First World") has long passed this point.