Where will conservatives go? Why socialism was dead?

(Left image; old elephant, kodak ekter100)
Socialism had failed to construct good society long
before. But Socialism used to be thought it making society better than old society. After all ,what was socialism ? If conservative fails to recognize this correctly, Conservatives will make same mistake.
Generally speaking, market oriented economists are saying right about economy system.
But I doubt that conservatives don't recognize other important problem.
Socialism depended on the false precondition about reproduction of family and marriage. Mainly in 19th century,early socialists claimed false theories about family and marriage. For example,they thought "in the primitive age or society, there were free and group marriage systems". Marxism was based on these but rejected free market system. Lately anthropologists convinced these were false theory.To be different from free market,Such marriage system can't exit anywhere.