gistfile1.rb

# Step 1. Setting up environment

class Government
  def power
    "belongs to government"
  end
end

module People
  def power
    "belogs to people"
  end

  Government.__send__ :include, self
end

government = Government.new


# Step 2. Swapping ancestors by re-setting @superclass

included_module = Government.instance_eval { @superclass }

government.metaclass.instance_eval { @superclass = included_module }
included_module.instance_eval { @superclass = Government }
Government.instance_eval { @superclass = Object }


# Step 3. Testing

puts government.metaclass.superclass_chain.inspect
# => [#<IncludedModule People>, Government, Object, #<IncludedModule Kernel>] <-------- cool, prepended module is before Class
puts government.power
# =>  belongs to people  <--------- this is right