A drilling system (10,38,46,52,58), comprising: an outer sleeve; and a first rotary steerable module, comprising: a first shaft extending within the outer sleeve; a first bearing disposed within the outer sleeve and through which the first shaft extends; a second bearing disposed within the outer sleeve and through which the first shaft extends, wherein the second bearing is spaced from the first bearing along the first shaft; a first cam disposed within the outer sleeve so that the first cam is positioned along the first shaft between the first and second bearings (22,24), the first cam comprising: a first eccentric ring through which the first shaft extends; and a second eccentric ring extending about the first eccentric ring; wherein the extension of the first shaft through the first eccentric ring defines a first bend in the first shaft within the outer sleeve, the first bend having a first bend angle; and a second cam disposed within the outer sleeve so that the second cam is positioned along the first shaft between the first cam and the second bearing, the second cam comprising: a third eccentric ring through which the first shaft extends; and a fourth eccentric ring extending about the third eccentric ring; wherein the extension of the first shaft through the third eccentric ring defines a second bend in the first shaft within the outer sleeve, the second bend having a second bend angle. an outer sleeve; and a first rotary steerable module, comprising: a first shaft extending within the outer sleeve; a first bearing disposed within the outer sleeve and through which the first shaft extends; a second bearing disposed within the outer sleeve and through which the first shaft extends, wherein the second bearing is spaced from the first bearing along the first shaft; a first cam disposed within the outer sleeve so that the first cam is positioned along the first shaft between the first and second bearings (22,24), the first cam comprising: a first eccentric ring through which the first shaft extends; and a second eccentric ring extending about the first eccentric ring; wherein the extension of the first shaft through the first eccentric ring defines a first bend in the first shaft within the outer sleeve, the first bend having a first bend angle; and a second cam disposed within the outer sleeve so that the second cam is positioned along the first shaft between the first cam and the second bearing, the second cam comprising: a third eccentric ring through which the first shaft extends; and a fourth eccentric ring extending about the third eccentric ring; wherein the extension of the first shaft through the third eccentric ring defines a second bend in the first shaft within the outer sleeve, the second bend having a second bend angle. a first shaft extending within the outer sleeve; a first bearing disposed within the outer sleeve and through which the first shaft extends; a second bearing disposed within the outer sleeve and through which the first shaft extends, wherein the second bearing is spaced from the first bearing along the first shaft; a first cam disposed within the outer sleeve so that the first cam is positioned along the first shaft between the first and second bearings (22,24), the first cam comprising: a first eccentric ring through which the first shaft extends; and a second eccentric ring extending about the first eccentric ring; wherein the extension of the first shaft through the first eccentric ring defines a first bend in the first shaft within the outer sleeve, the first bend having a first bend angle; and a first eccentric ring through which the first shaft extends; and a second eccentric ring extending about the first eccentric ring; wherein the extension of the first shaft through the first eccentric ring defines a first bend in the first shaft within the outer sleeve, the first bend having a first bend angle; and a second cam disposed within the outer sleeve so that the second cam is positioned along the first shaft between the first cam and the second bearing, the second cam comprising: a third eccentric ring through which the first shaft extends; and a fourth eccentric ring extending about the third eccentric ring; wherein the extension of the first shaft through the third eccentric ring defines a second bend in the first shaft within the outer sleeve, the second bend having a second bend angle. a third eccentric ring through which the first shaft extends; and a fourth eccentric ring extending about the third eccentric ring; wherein the extension of the first shaft through the third eccentric ring defines a second bend in the first shaft within the outer sleeve, the second bend having a second bend angle.