What would change if I used the causative in this sentence?


> 人間の生き方をより純化にしたものが聖杯戦争という殺し合いだ

A battle to the death which is the Holy grail War, an event which is purer
than the way of lives of humans.

> 人間の生き方をより純化にさせたものが聖杯戦争という殺し合いだ

A battle to the death which is the Holy grail War, an event which makes a
thing purer than the way of lives of humans.

My idea is that in the first 1, the one with no causative,

> 人間の生き方をより純化にした

is describing "もの", so the thing which is purer than the lives of the humans
is もの.

If I used the causative it would make もの the thing which is causing the fact
of being purer.

Am I correct?




First of all, as I posted in the comment, 純化 is a suru-verb meaning _to
purify_ , and 純化 **に** する doesn't make much sense. We never need に there. I
believe this sentence should have been:

> [A] 人間の生き方をより純化したものが聖杯戦争という殺し合いだ。

Second, `X + を + [te-form of verb] + た/だ + もの` can mean "the product made by
～ing X", "the result from ～ing X", etc. （eg, 刺身【さしみ】とは、生【なま】の魚を切ったものだ。）

Therefore, in this case, 人間の生き方をより純化したもの just means "The human's way of life
(itself) which is purified" rather than "An event which purified human's way
of life." And the whole sentence means "The death match called 聖杯戦争 is a
purified form of human's way of life."

* * *

Now, to answer your original question:

> [B] 人間の生き方をより **純化させた** ものが聖杯戦争という殺し合いだ。

Yes, it's also OK to say like this. This sentence is as natural as Sentence A,
and means exactly the same thing as A. This is because 純化 happens to be used
both transitively and intransitively, which is **_not_** the case for many
other words which have `～化`. (For example, 強化する/美化する is only transitive but
劣化する/進化する is only intransitive. I don't know why.)

In Sentence A, 純化 is used as a transitive verb, whose object is marked with を.
The phrase literally means "The thing made by purifying human's way of life."
In Sentence B, 純化 is used as an intransitive verb, whose causative form is
"[causee]を[verb]させる". The phrase literally means "The thing made by making
human's way of life sublime/purify itself."

By the way, the following sentence is also the same as A and B.

> [C] 人間の生き方 **が** より **純化された** ものが聖杯戦争という殺し合いだ。

In other words, 純化したX, 純化されたX, 純化させたX all roughly refer to the same thing
("purified X"), although there's a small difference in nuance.




First of all, as I posted in the comment, 純化 is a suru-verb meaning _to
purify_ , and 純化 **に** する doesn't make much sense. We never need に there. I
believe this sentence should have been:

> [A] 人間の生き方をより純化したものが聖杯戦争という殺し合いだ。

Second, `X + を + [te-form of verb] + た/だ + もの` can mean "the product made by
～ing X", "the result from ～ing X", etc. （eg, 刺身【さしみ】とは、生【なま】の魚を切ったものだ。）

Therefore, in this case, 人間の生き方をより純化したもの just means "The human's way of life
(itself) which is purified" rather than "An event which purified human's way
of life." And the whole sentence means "The death match called 聖杯戦争 is a
purified form of human's way of life."

* * *

Now, to answer your original question:

> [B] 人間の生き方をより **純化させた** ものが聖杯戦争という殺し合いだ。

Yes, it's also OK to say like this. This sentence is as natural as Sentence A,
and means exactly the same thing as A. This is because 純化 happens to be used
both transitively and intransitively, which is **_not_** the case for many
other words which have `～化`. (For example, 強化する/美化する is only transitive but
劣化する/進化する is only intransitive. I don't know why.)

In Sentence A, 純化 is used as a transitive verb, whose object is marked with を.
The phrase literally means "The thing made by purifying human's way of life."
In Sentence B, 純化 is used as an intransitive verb, whose causative form is
"[causee]を[verb]させる". The phrase literally means "The thing made by making
human's way of life sublime/purify itself."

By the way, the following sentence is also the same as A and B.

> [C] 人間の生き方 **が** より **純化された** ものが聖杯戦争という殺し合いだ。

In other words, 純化したX, 純化されたX, 純化させたX all roughly refer to the same thing
("purified X"), although there's a small difference in nuance.

