Fichte is concerned with freedom as non-domination.
Fichte thinks that the mutual recognition of one another as free beings belongs among the transcendental conditions of self-consciousness itself.
Hegel's theory of recognition is basically derived from Fichte, who is its real author.
Some of Kant's particular moral opinions, either because he shared the prejudices of his time, or because of his own personal crotchets, can strike sensible people as ridiculous or offensive. But in my view, his own theory provides us with the resources (the best resources available, I believe) to correct his own personal errors or cultural prejudices.
I don't think Kant's theory looks bad to people except insofar as they have misunderstood it (for instance, as heartless and ironheaded, or as committed to an absurd metaphysical conception of freedom that violates Kant's own philosophy).
Fichte is a necessary step to both Hegel and Marx.
When people think that moral problems can be solved by some simple strategy of calculation, that sets them up for ghastly overreaching. They think they can turn everything into a "science" the way mechanics was turned into a science in the seventeeth century. They want to turn everything over to technocrats and social engineers. They become shortsighted or simplistic about their ends, and they disastrously overestimate their ability to acquire the information they need to make the needed calculations.
The moral law is simply the way we think our own freedom as self-determination.
It is rational to choose the right means to your ends to develop very elegant abstract formal theories of rational choice, and then turn these into what look like moral theories. Philosophers tend to be ravished by the formal beauty of such theories, and they don't pay much attention to the fact that our human limitations make them pretty useless in practice, while the simple point about instrumental reasoning is too shallow to be of much real moral interest.
We cannot predict the effects of our actions, especially our collective actions over generations or centuries, to use instrumental reasoning toward these big final ends to tell us what we ought to do.
When Marx, in the Theses on Feuerbach, says that only idealism up to now has understood the active side of material Praxis, what he says is more true of Fichte than of any other philosopher in the classical German tradition.
Both Kant and Fichte thought of traditions of revealed religion as ways of symbolically (that is, with aesthetic emotional power) thinking about our moral condition. Both thought that religion would become more and not less powerful, emotionally and morally, if the claims of scriptures and religious teachings were taken symbolically rather than literally (whatever 'literally' might mean in the case of claims that are either nonsensical or outdated or historically unsupportable if taken as metaphysical or historical assertions).
It is a culturally interesting (but also deeply depressing) fact that many religious claims seem to retain their emotional power for believers only if taken in ways that are intellectually unsupportable and even morally contemptible.
It is actually a nice question how far Descartes himself endorses the monological and metaphysically dualistic theory of mind associated with his name and his legacy in early modern philosophy. But Fichte does reject this tradition, by suggesting that an immaterial thinking substance is an incoherent notion, and a rational being whose rationality was not developed through communication with others is a transcendental impossibility.
That Hegel's theory is derivative from Fichte's does not prevent it from being strikingly original and of independent value.
Those who employ their modest talents as best they can do make a contribution to a better human future.
Leaders of nations, and people whose wealth or fame gives them power over the lives of others quite often do more harm than good.
In my acquaintance with John Rawls, I found him to be a simple and honest man, who just by chance also happened to be the greatest moral philosopher of the twentieth century. I would like to think that I could emulate at least his modesty - his refusal to exaggerate his perception of himself and his place in the larger scheme of things - even if my work never compares with his in its importance.
What I most fear now is that within a century or so there may not be any human future at all.
Surely the world will be a better place, at least marginally, if people have a better understanding of Kant and Hegel, if Marx's thought its studied and appreciated, if people gain a better understanding of Fichte, whose philosophy is far more important than people realize.
It seems to me self-evident that it is worthwhile to understand the best thoughts of the past, to appropriate them, to criticize them.
The problem is that many who reject Marx do not read him, or read him only by bringing prejudices to their reading that prevent them from understanding him.
What are we to think of the shortsightedness of the great mass of people who are content to do nothing about it, and even worse, the greed or venality of the rich and powerful who deliberately bar the way to human survival?
Kant takes a free will to be a being or substance with the power to cause a state of the world (or a whole series of such states) spontaneously or from itself.
I do not know how much my own work has achieved, and I must not pretend it has done more than it has.