Maslow, McClelland, and Herzberg would likely find common agreement in respect to a set of “higher order” needs. For Maslow these are self-actualization and ego; they correspond with Alderfer's growth needs, and with McClelland's needs for achievement and power. Maslow's social needs link up with relatedness needs in Alderfer's theory and the need for affiliation in McClelland's theory. Maslow's safety needs correspond to Alderfer's existence needs. Herzberg's “satisfier-factors” correspond to satisfactions of Maslow's higher needs, Alderfer's growth needs, and McClelland's need for achievement.