Although it follows closely after Berkano, a very female rune, Ingwaz is Berkano's polar opposite in terms of matters of gender. Mannaz became Man in Anglo-Saxon, and thus on into Modern English. It became Mannar or Madhr in Old Norse. All three Rune Poems refer to the relationship between Humanity and dust or Earth. Our own myths see us as having evolved from inert matter, specifically from tree trunks, which of course grow from the Earth.
Humans are social creatures.
Nevertheless, Mannaz is more a rune of self-examination than of social life. Gebo, Wunjo, and to an extent Sowilo embody our more pleasant human relationships. Tiwaz expresses the more combative side of them. Some folks make the mistake of worrying too much about what others think of them, thinking that others may be right in thinking ill of them, and as a result never get to know themselves, or develop a strong sense of self. I used to be like that.