Value drift fits your constraints. Our ability to drift accelerates as enhancement technologies increase in power. If values drift substantially and in undesirable ways because of, e.g. peacock contests, (a) our values lose what control they currently have (b) could significantly lose utility because of the fragility of value (c) is not an extinction event (d) seems as easy to effect as x-risk reduction.
Value drift fits your constraints. Our ability to drift accelerates as enhancement technologies increase in power. If values drift substantially and in undesirable ways because of, e.g. peacock contests, (a) our values lose what control they currently have (b) could significantly lose utility because of the fragility of value (c) is not an extinction event (d) seems as easy to effect as x-risk reduction.