Chapter 64 - Exponential Growth

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By design of God, living organisms reproduce offspring after their kind. Generally, it occurs when male and female parent organisms combine DNA, the genetic blueprint of created life, to multiply other living organisms “after their kind.”

The New Testament church community was designed as a living organism. Its community is comprised of God and the redeemed with whom He has chosen to share His life (zoe).

God alone can nurture the growth of the living (zoe) New Testament church community. It grows whenever and wherever He chooses to share His infinite, eternal life (zoe) with finite mankind.

Exponential Church Growth

The early New Testament church on earth grew rapidly. Its rapid growth occurred by the multiplication of divine life (zoe) at an exponential rate.

Growth that occurs by exponential multiplication occurs at a progressively increasing rate. For example, if a variable of two is multiplied annually by an exponent of two, growth is doubled each year:

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Year	Variable x Exponent	Total Growth
1	2 x 2	4
2	4 x 2	8
3	8 x 2	16
4	16 x 2	32

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Growth by Addition

In contrast to exponential growth, the growth of the church by addition is incremental. Significantly slower than exponential growth, incremental growth occurs when one or more individuals are added to a pre-existing group.

For example, if a variable of two is consistently increased by two, the size of the group is initially doubled. Thus, the resultant growth arrives at the exact total as the early stages of exponential growth. However, as represented in the following table, that is where the similarity ends:

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Year	Variable + Increment	Total Growth
1	2 + 2	4
2	4 + 2	6
3	6 + 2	8
4	8 + 2	10

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As demonstrated, growth by incremental addition is much slower than growth by exponential multiplication. Four generations of each produce significantly different results. Exponential growth produced 32 new individuals while incremental growth produced only 10.

Growth by Multiplication

By eternal design, the initial growth of the early New Testament church was predominantly incremental. It began with 120 people in ancient Jerusalem. (Acts 1:15)

By the Spirit, new believers were continually added to the early ecclesia. (Acts 2:41, 47; 5:14; cf. Acts 4:4) By the end of the first day, “there were added about three thousand souls,” and the Lord continued “adding to their number day by day those who were being saved.” (Acts 2:41, 47) The Greek word translated “add” in Acts 2 is prostithemi (pros-tith'-ay-mee). Of the 16 times it is used in the New Testament, 11 are translated as “add.”

Within a concise period, the number of men alone added to the early church rose to “about five thousand.” (Acts 4:4) “At the hands of the apostles many signs and wonders were taking place among the people; and they were all with one accord in Solomon’s portico….And all the more believers in the Lord, multitudes of men and women, were constantly added to their number.” (Acts 5:12, 14) Through the addition of incremental growth, the early church arrived at the necessary critical mass for rapid growth by exponential multiplication.

Once an adequate number of converts were added to the early New Testament church, it was prepared for much more significant growth through exponential multiplication. (Acts 6:1, 7; 9:31; cf. Acts 7:17) “The word of God kept on spreading; and the number of the disciples continued to increase greatly in Jerusalem.” (Acts 6:7) The Greek word translated “increase” is plethuno (play-thoo'-no). Of its 12 uses in the New Testament, 11 are translated as “multiply.”

When critical mass was reached, the growth rate of the early New Testament church was evidential of the multiplication of small group communities at an exponential or progressively increasing rate. (Acts 6-16) Based on the numbers recorded in the Book of Acts, it is apparent that the early New Testament church grew to as many as 10,000 new believers during its first two years of existence.

World Population Growth

Like the early New Testament church, the recent growth of world population has occurred at an exponential rate. Therefore, if the modern New Testament church is to be effective in fulfilling its mission, it must return to a growth strategy capable of keeping pace with the exponential growth rate of world population.

In about 4100 years, from the approximate time of Noah’s flood until AD1800, the world population reached critical mass at the 1 billion mark. Through exponential rather than incremental growth, the second billion was reached in only about 127 years (AD1927), the third billion in 33 years (AD1960), the fourth billion in 15 years (AD 1975), the fifth billion in 12 years (AD 1987), the sixth billion in another 12 years after the fifth (AD 1999) and the seventh billion in about the same length of time (AD 2012). As of mid-2023, the current world population has reached 8.1 billion.

During the last 100 years, world population has grown exponentially from 2 billion to more than 8 billion. The twentieth century alone witnessed population growth from about 1.65 billion to 6 billion. It will continue to grow at an exponential rate for the foreseeable future.[1]

The multiplication of world population at an exponential rate combined with a long-term incremental church growth strategy has caused the number of people who have never heard the Gospel to grow disproportionately in relation to the number of those who have heard. For the New Testament church to fulfill its mission on earth, it must grow in proportion to the progressively increasing growth rate of the world population. Therefore, it must once again adopt a strategy for growth characterized by multiplication at an exponential rate.

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New Testament Church Growth

New Testament church growth characterized by multiplication at a progressively increasing rate can reach an exceptionally large number of people in a short time. The example of growth by exponential multiplication given above started with a variable of two. It was progressively multiplied by an exponent of two. Allowing the variable to represent the beginning number of people in the New Testament church community, growth increases to 32 people by the fourth year. Thus, it would take four years to accomplish growth from two to 32 people. It might not seem like rapid growth. However, if the growth continues to double, it will reach 512 people by the eighth year.

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Year	Variable x Exponent	Total Growth
5	32 x 2	64
6	64 x 2	128
7	128 x 2	256
8	256 x 2	512

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Continuing to grow by exponential multiplication, the New Testament church experiences much more significant growth:

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Year	Variable x Exponent	Total Growth
9	512 x 2	1,024
10	1024 x 2	2,048
11	2048 x 2	4,096
12	4096 x 2	8,192

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Its rate of growth uninterrupted, the New Testament church would double in size annually. Thus, it would grow to 8,589,934,592 people in only 32 years. Theoretically, the growth of the New Testament church growth by exponential multiplication would more than encompass the world's entire population in less than 32 years!

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Year	Variable x Exponent	Total Growth
13	8,192 x 2	16,384
14	16,384 x 2	32,768
15	32,768 x 2	65,536
16	65,536 x 2	131,072
17	131,072 x 2	262,144
18	262,144 x 2	524,288
19	524,288 x 2	1,048,576
20	1,048,576 x 2	2,097,152
21	2,097,152 x 2	4,194,304
22	4,194,304 x 2	8,388,608
23	8,388,608 x 2	16,777,216
24	16,777,216 x 2	33,554,432
25	33,554,432 x 2	67,108,864
26	67,108,864 x 2	134,217,728
27	134,217,728 x 2	268,435,456
28	268,435,456 x 2	536,870,912
29	536,870,912 x 2	1,073,741,824
30	1,073,741,824 x 2	2,147,483,648
31	2,147,483,648 x 2	4,294,967,296
32	4,294,967,296 x 2	8,589,934,592

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In contrast, church growth by incremental addition produces a much less significant result. For example, beginning with two people and annually adding two more people yields growth of 64 people in 32 years.
The distinct growth of the living (zoe) church of the New Testament does not occur by human effort through organizational principle and precept. It is an ineffective strategy that leads only to the addition of adherents. Instead, the New Testament church was designed to grow exponentially by the multiplication of divine life (zoe) in the elect.

Small Group Community Growth

Even more significant, the rapid growth of the early New Testament church did not occur merely by the exponential multiplication of eternal life (zoe) in individual human beings. Instead, it was the result of the exponential multiplication of small group communities. Thus, entirely new small group communities, typically consisting of 10-20 people each, were multiplied at a progressively increasing rate. Theoretically, then, the New Testament church could share the Gospel with the entire population of the world in even less than 32 years.

For example, the church could begin with one small group community of 12 adults. Randomly choosing six months as a reasonable length of time to multiply, in six additional months there would be two small group communities of 12 adults. Concordant with exponential multiplication, in six more months there would be four small group communities. Again, in another six months there would be eight small group communities. Continuing to multiply every six months, in only five years the church would consist of 1024 small group communities. Altogether they would total 12,288 adults in small group community.

New Testament church growth cannot be achieved for God. He alone can cause His ecclesia to grow. Therefore, man’s role in the growth of the New Testament church is not trying but trusting.

© 2023 James Hiatt

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