Escape from Freedom[1]! the meat of Fromm's thesis is that modern societies have attained a lot of "negative freedom" (i.e. freedom from necessities and/or authorities), but the corresponding growth in "positive freedom" (freedom to express oneself authentically and genuinely) has been lackluster. the result is
that we become "burdened" by the responsibilities of freedom, unable to handle it without feeling overwhelmed. instead, we resort to escape mechanisms: e.g. by seeking refuge in authoritarian leaders, or by conforming to societal standards and expectations. both are detrimental, Fromm says, as they undermine individual freedom. Fromm urges that we should pay more attention to our thoughts and actions, and to be more wary of them, as they may or may not be genuine expressions of our inner selves.
[1] https://en.wikipedia.org/wiki/Escape_from_Freedom