The blocks had to go up. A pyramid 146.6 m high needs some way to raise 2.3 million blocks to their places. The most common idea is a ramp, a sloping track of earth, brick or rubble. But no ramp survives beside the Great Pyramid in a form that settles the question, so several ramp designs are proposed. Here you will compare them like an engineer, and see why the honest answer is 'not settled'.