"That to do and that not to do" are two main questions of ethics. "A bit to amuse and a bit change" are two primary objectives of this book. Alexander Силаев looks at the modern model of the world from the ethic point of view. Tells how to separate correct desires from wrong, last, - to decompose on their wrong shelves. Takes apart failures from the mathematical point of view and bad advices. Suggests to practise in ethic questions and honestly to answer on some of them: after how many will you betray a friend? to what border will reach? will you be able to endow one man, if on kitty there will be lives five? A publishing layout is stored in the format of PDF A4.