6 Fundamental Primal Human Movements
A push isn’t an exercise per se but rather a category of movement.
It includes the push-up, the military press, and the bench press, all of which are big pushes. Forced to rank them, they'd be ranked in that order: best, better, and still great.
Within each category of human movement, you want to do the movements that offer the highest return on investment. The push does that. And the push-up in particular is perhaps the perfect primal exercise, working trunk stability and upper-body pushing strength. This classic gym class exercise strengthens the chest, shoulders, triceps, and abs.