sympathy (which leads to our regarding the approbation and disapprobation of others), having served as the primary impulse and guide."[22] And with regard to the future, Darwin says: "Looking to future generations, there is no cause to fear that the social instincts will grow weaker, and we may expect that virtuous habits will grow stronger, becoming perhaps fixed by inheritance. In this case the struggle between our higher and lower impulses will be less severe, and virtue will be triumphant."[23]