•Why it earns a slot
In Memoriam is the defining Victorian poem of grief and doubt, the work in which Tennyson most directly confronted the collision between Christian faith and geological and evolutionary science, and its phrase 'nature red in tooth and claw' entered the language as a permanent shorthand for that conflict.
In Memoriam is a sequence of 131 lyric poems written over seventeen years following the sudden death in 1833 of Tennyson's closest friend, Arthur Henry Hallam, who died in Vienna. The poems trace the poet's journey through raw grief, religious doubt, and philosophical crisis, arriving finally at a hard-won faith in God, love, and human progress. The sequence ends not in despair but in affirmation, culminating in a wedding poem that envisions Hallam as a noble forerunner of a higher race toward which all creation moves.
This distillation is written from the freely available original, which is always the better read when you have the time: gutenberg.org.