My speculation has for a long time been what I call the uniform cooling hypothesis. There are no type III civilizations because such things haven&#x27;t happened yet.<p>If the universe is all the same age and if the emergence and evolution of life is tied to the overall thermodynamic evolution of the universe, then everything might be approximately of the same scale and complexity within a certain standard deviation.<p>If this is true then when we go out there we will meet all the others who have also just developed to that level.