Quran is very optimistic in issues of human progression. Human evolution into higher (mental/moral) stages is unavoidable. It's an unstoppable process which will cause mental enlightenment of people and lead to peace. Evolution advances very progressive for all humans, regardless of difficulties and hardship humankind faces. Allahs ayahs (signs) are clear and rational comprehensible - whoever denies them, denies science and objective truths. Truth, rationality and peace will prevail, there is no getting around it.