Of course, Einstein was a very great scientist indeed, and I have enormous respect for him, and great admiration for the discoveries he made. But he was very committed to a view of the objectivity of the physical world. ↗
An easy approach to the walls must be provided against: indeed they should be surrounded by uneven ground, and the roads leading to the gates should be winding and turn to the left from the gates. ↗
Indeed, when all parties campaign effectively the overall effect is to push up voting rates, as you see in tight marginal seats or close general elections. That must be good for democracy. ↗