Just how different can intelligent ayylmaos be from humans?

Can a non-pack animal like bear or tiger types form a civilization and achieve interstellar travel and human-like level of development? Can aquatic animals (like dolphins)? Can eusocial animal societies (like bees and ants) do it?

Is individualism completely necessary for space flight and high tech or could ant-like species do it? Could solitary animals group together by rationality and form advanced societies? Is human-like terrestrial pack animal behavior absolutely necessary?