Enhancement and obsolescence are obviously 
complementary actions. Any new technique or 
idea or tool, while enabling a new range of 
activities by the user, pushes aside the older ways 
of doing things. Money speeds transactions and 
gives rise to uniform pricing systems, obsolescing 
haggle and barter and much of the human 
relation to commodities. The motor car enhances 
private mobility, and pushes aside the old 
organization of the city in favor of the suburb. 
“No-fault divorce” enhances the corporate sharing 
of risk and responsibility and displaces private 
responsibility. “The pill” tends to banish insecurity 
and uncertainty, while enhancing the