Небольшая уступка помогает людям договориться.

Because it is an adjective agreeing with уступка, which is:

• feminine
• singular
• nominative

So небольшая уступка means a small / slight concession.

The dictionary form is небольшой, but adjectives change endings to match the noun they describe:

• masculine: небольшой
• feminine: небольшая
• neuter: небольшое
• plural: небольшие

Уступка means a concession, a compromise move, or giving way on one point.

In this sentence, it does not mean physically yielding space. It means something like:

• making a small concession
• giving up a little on your side
• meeting the other person halfway

So небольшая уступка is a very natural way to say a small concession.

Because the subject is singular: небольшая уступка.

The verb помогает is the 3rd person singular present-tense form of помогать:

• я помогаю
• ты помогаешь
• он/она помогает
• мы помогаем
• они помогают

Since уступка is one concession, not many concessions, the verb is singular.

Because помогать normally takes the dative case for the person being helped.

So:

• люди = people (nominative)
• людям = to people (dative)

The pattern is:

помогать кому? = to help whom?

Examples:

• помогать другу = to help a friend
• помогать детям = to help children
• помогать людям = to help people

So in the sentence, небольшая уступка помогает людям... means a small concession helps people...

Because it works with помогать in the pattern:

помогать кому-то + infinitive

This means to help someone do something.

So:

• помогает людям договориться = helps people reach an agreement

Other examples of the same pattern:

• Это помогает детям учиться. = This helps children study.
• Спорт помогает людям расслабиться. = Sport helps people relax.

Because договориться is the perfective form, which focuses on the result: actually reaching an agreement.

• договариваться = to be negotiating / to be in the process of agreeing
• договориться = to come to an agreement / to reach an agreement

In this sentence, the idea is that a small concession helps people successfully arrive at agreement, so the perfective verb is the natural choice.

The -ся makes the verb reflexive, but with this verb it is best understood as part of the whole dictionary form rather than translated literally as oneself.

договориться is a common verb meaning:

• to come to an agreement
• to agree among themselves
• to arrange something by agreement

So you should learn it as a full unit:

договориться = to reach an agreement

It is related to говорить (to speak), but its actual meaning is idiomatic and much more specific.

Yes. A very useful pattern is:

что-то помогает кому-то сделать что-то

In this sentence:

• небольшая уступка = what helps
• людям = whom it helps
• договориться = what it helps them do

So the full structure is:

[subject] + помогает + [dative person] + [infinitive]

This is a very common Russian sentence pattern.

Yes. Here it means something more like:

• small
• slight
• minor
• modest

So небольшая уступка is not about physical size. It means a concession that is not very big or costly.

In many contexts, небольшой / небольшая / небольшое can mean modest rather than literally small.

Because Russian has no articles like English a and the.

So небольшая уступка can mean:

• a small concession
• the small concession

The exact meaning depends on context. In this sentence, English naturally uses a small concession, but Russian does not need a separate word for that.

No, Russian word order is flexible, though the given version is the most neutral and natural:

Небольшая уступка помогает людям договориться.

Because the case endings already show the grammatical roles, Russian can move words around for emphasis. For example:

• Людям помогает договориться небольшая уступка.
• Договориться людям помогает небольшая уступка.

These versions are possible, but they sound more marked or stylistically shaped. For a learner, the original order is the best one to use first.

Not really, at least not with exactly the same meaning.

• договориться = to come to an agreement, often after discussion or negotiation
• согласиться = to agree, to consent, to say yes

So помогает людям договориться means helps people reach an agreement with each other.

If you used согласиться, the meaning would shift toward helping people agree/consent, not necessarily working out a mutual agreement.

A natural stress pattern is:

Небольша́я усту́пка помога́ет лю́дям договори́ться.

Rough pronunciation guide:

• Небольша́я = ne-bal-SHA-ya
• усту́пка = oo-STOOP-ka
• помога́ет = pa-ma-GA-yet
• лю́дям = LYOO-dyam
• договори́ться = da-ga-va-REET-sa

The most important thing is to place the stress correctly, especially in небольша́я, помога́ет, and договори́ться.

Not necessarily. Singular in Russian can also express a general idea.

So Небольшая уступка помогает людям договориться means something like:

• a small concession helps people reach agreement
• making a small concession helps people reach agreement

It does not have to refer to one particular concession in a specific situation. It can be a general statement.