> Progress has solved every problem the human race has ever had. Taken literally, then the human race does not currently have any problems, otherwise there wou

> Progress has solved every problem the human race has ever had. Taken literally, then the human race does not currently have any problems, otherwise there would be at least one of the problems we have ever had which is not solved. But what I think you are actually arguing sounds tautological to me: for every problem that has been solved, it has been solved by "progress". I don't know if you mean technological advancement or social change or something else, but it appears as if progress is defined in terms of solving a problem. All that is left is for you to show that every problem has an achievable solution to warrant the optimism in "progress". Otherwise, it just seems like your optimism is based in the premise that the human race has solved problems in the past; persistent, long-standing, and current human problems notwithstanding.