Toppling motion along an inclined plane

This article discusses a scenario/arrangement whose statics/dynamics/kinematics can be understood using the ideas of classical mechanics.
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The brown triangle is the fixed inclined plane and the black block is placed on it with a dry surface of contact. The highlighted point at the bottom of the block is the point about which toppling could occur.

The scenario here is a dry block (with a stable surface of contact) on a dry fixed inclined plane, with $\theta$ being the angle of inclination with the horizontal axis, considering the possibility that the block topples. The block is assumed to be cuboidal placed along the incline as shown, with $l$ the length along the incline and $b$ the height perpendicular to the incline.